diff --git a/Cartfile.resolved b/Cartfile.resolved
index 4eea97a..5faa16a 100644
--- a/Cartfile.resolved
+++ b/Cartfile.resolved
@@ -1,4 +1,4 @@
-github "Clipy/LoginServiceKit" "v1.0.0"
-github "Clipy/Magnet" "v2.0.0"
-github "sparkle-project/Sparkle" "1.15.1"
-github "Clipy/KeyHolder" "v2.0.0"
+github "Clipy/KeyHolder" "v2.1.0"
+github "Clipy/LoginServiceKit" "v1.2.0"
+github "Clipy/Magnet" "v2.1.0"
+github "sparkle-project/Sparkle" "1.19.0"
diff --git a/Fuwari.xcodeproj/project.pbxproj b/Fuwari.xcodeproj/project.pbxproj
index 18b0618..8198fc7 100644
--- a/Fuwari.xcodeproj/project.pbxproj
+++ b/Fuwari.xcodeproj/project.pbxproj
@@ -31,6 +31,7 @@
 		BEC844FB1DED859300A4A57A /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = BEC844FA1DED859300A4A57A /* Assets.xcassets */; };
 		BEC844FE1DED859300A4A57A /* Main.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = BEC844FC1DED859300A4A57A /* Main.storyboard */; };
 		BEC8450C1DF59ECB00A4A57A /* CaptureGuideView.swift in Sources */ = {isa = PBXBuildFile; fileRef = BEC8450B1DF59ECB00A4A57A /* CaptureGuideView.swift */; };
+		BECCBA7F2096F95000D13978 /* StateManager.swift in Sources */ = {isa = PBXBuildFile; fileRef = BECCBA7E2096F95000D13978 /* StateManager.swift */; };
 		BEF57FE51DFD46AE006595B6 /* PreferencesWindowController.swift in Sources */ = {isa = PBXBuildFile; fileRef = BEF57FE41DFD46AE006595B6 /* PreferencesWindowController.swift */; };
 		BEF57FED1DFD53D3006595B6 /* UpdatePreferenceViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = BEF57FEC1DFD53D3006595B6 /* UpdatePreferenceViewController.swift */; };
 		BEF57FEF1DFD58D4006595B6 /* NSColor+Fuwari.swift in Sources */ = {isa = PBXBuildFile; fileRef = BEF57FEE1DFD58D4006595B6 /* NSColor+Fuwari.swift */; };
@@ -69,6 +70,7 @@
 		BEC844FD1DED859300A4A57A /* Base */ = {isa = PBXFileReference; lastKnownFileType = file.storyboard; name = Base; path = Base.lproj/Main.storyboard; sourceTree = "<group>"; };
 		BEC844FF1DED859300A4A57A /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
 		BEC8450B1DF59ECB00A4A57A /* CaptureGuideView.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = CaptureGuideView.swift; sourceTree = "<group>"; };
+		BECCBA7E2096F95000D13978 /* StateManager.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = StateManager.swift; sourceTree = "<group>"; };
 		BEF57FE41DFD46AE006595B6 /* PreferencesWindowController.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = PreferencesWindowController.swift; sourceTree = "<group>"; };
 		BEF57FEC1DFD53D3006595B6 /* UpdatePreferenceViewController.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = UpdatePreferenceViewController.swift; sourceTree = "<group>"; };
 		BEF57FEE1DFD58D4006595B6 /* NSColor+Fuwari.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = "NSColor+Fuwari.swift"; sourceTree = "<group>"; };
@@ -135,6 +137,7 @@
 				BEC8450B1DF59ECB00A4A57A /* CaptureGuideView.swift */,
 				BE7E82581DF72E7A00F3F2F8 /* FullScreenWindow.swift */,
 				BE7E825A1DF74A2D00F3F2F8 /* FloatWindow.swift */,
+				BECCBA7E2096F95000D13978 /* StateManager.swift */,
 				BE5BE7A31E065D7800820201 /* HotKeyManager.swift */,
 				BE9777F71E100D1F00E5934F /* MenuManager.swift */,
 				BE6D5E741E12CF5E005492B2 /* AboutWindowController.swift */,
@@ -220,12 +223,13 @@
 			isa = PBXProject;
 			attributes = {
 				LastSwiftUpdateCheck = 0810;
-				LastUpgradeCheck = 0810;
+				LastUpgradeCheck = 0820;
 				ORGANIZATIONNAME = AppKnop;
 				TargetAttributes = {
 					BEC844F21DED859300A4A57A = {
 						CreatedOnToolsVersion = 8.1;
 						DevelopmentTeam = QZJ74E9669;
+						LastSwiftMigration = 0930;
 						ProvisioningStyle = Automatic;
 					};
 				};
@@ -317,6 +321,7 @@
 				BE6D5E761E12CF5E005492B2 /* AboutWindowController.swift in Sources */,
 				BE5BE7A41E065D7800820201 /* HotKeyManager.swift in Sources */,
 				BE5896A11DFCED26007CE7AC /* LocalizedString.swift in Sources */,
+				BECCBA7F2096F95000D13978 /* StateManager.swift in Sources */,
 				BEC8450C1DF59ECB00A4A57A /* CaptureGuideView.swift in Sources */,
 				BEC844F71DED859300A4A57A /* AppDelegate.swift in Sources */,
 				BE9777ED1E0E613700E5934F /* UserDefaults+ArchiveData.swift in Sources */,
@@ -405,6 +410,7 @@
 				CLANG_WARN_INFINITE_RECURSION = YES;
 				CLANG_WARN_INT_CONVERSION = YES;
 				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN_SUSPICIOUS_MOVE = YES;
 				CLANG_WARN_SUSPICIOUS_MOVES = YES;
 				CLANG_WARN_UNREACHABLE_CODE = YES;
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
@@ -455,6 +461,7 @@
 				CLANG_WARN_INFINITE_RECURSION = YES;
 				CLANG_WARN_INT_CONVERSION = YES;
 				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN_SUSPICIOUS_MOVE = YES;
 				CLANG_WARN_SUSPICIOUS_MOVES = YES;
 				CLANG_WARN_UNREACHABLE_CODE = YES;
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
@@ -494,7 +501,8 @@
 				MACOSX_DEPLOYMENT_TARGET = 10.11;
 				PRODUCT_BUNDLE_IDENTIFIER = com.appknop.Fuwari;
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_VERSION = 3.0;
+				SWIFT_SWIFT3_OBJC_INFERENCE = On;
+				SWIFT_VERSION = 4.0;
 			};
 			name = Debug;
 		};
@@ -514,7 +522,8 @@
 				MACOSX_DEPLOYMENT_TARGET = 10.11;
 				PRODUCT_BUNDLE_IDENTIFIER = com.appknop.Fuwari;
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_VERSION = 3.0;
+				SWIFT_SWIFT3_OBJC_INFERENCE = On;
+				SWIFT_VERSION = 4.0;
 			};
 			name = Release;
 		};
diff --git a/Fuwari.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist b/Fuwari.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
new file mode 100644
index 0000000..18d9810
--- /dev/null
+++ b/Fuwari.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>
diff --git a/Fuwari/AboutWindowController.swift b/Fuwari/AboutWindowController.swift
index 4f6b0a9..64f5e19 100644
--- a/Fuwari/AboutWindowController.swift
+++ b/Fuwari/AboutWindowController.swift
@@ -10,7 +10,7 @@ import Cocoa
 
 class AboutWindowController: NSWindowController {
 
-    static let shared = AboutWindowController(windowNibName: "AboutWindowController")
+    static let shared = AboutWindowController(windowNibName: NSNib.Name(rawValue: "AboutWindowController"))
     
     @IBOutlet private weak var versionTextField: NSTextField! {
         didSet {
diff --git a/Fuwari/AppDelegate.swift b/Fuwari/AppDelegate.swift
index d9e2af6..d11d450 100644
--- a/Fuwari/AppDelegate.swift
+++ b/Fuwari/AppDelegate.swift
@@ -16,8 +16,8 @@ import Crashlytics
 @NSApplicationMain
 class AppDelegate: NSObject, NSApplicationDelegate {
 
-    var eventMonitor: Any?
-    let defaults = UserDefaults.standard
+    private var eventMonitor: Any?
+    private let defaults = UserDefaults.standard    
     
     func applicationDidFinishLaunching(_ aNotification: Notification) {
         Fabric.with([Answers.self, Crashlytics.self])
@@ -27,6 +27,7 @@ class AppDelegate: NSObject, NSApplicationDelegate {
             promptToAddLoginItems()
         }
 
+        HotKeyManager.shared.configure()
         MenuManager.shared.configure()
     }
 
@@ -47,7 +48,7 @@ class AppDelegate: NSObject, NSApplicationDelegate {
     @objc func capture() {
         NSApp.activate(ignoringOtherApps: true)
         NotificationCenter.default.post(name: NSNotification.Name(rawValue: Constants.Notification.capture), object: nil)
-        eventMonitor = NSEvent.addGlobalMonitorForEvents(matching: [.mouseMoved, .leftMouseUp], handler: {
+        eventMonitor = NSEvent.addGlobalMonitorForEvents(matching: [NSEvent.EventTypeMask.mouseMoved, NSEvent.EventTypeMask.leftMouseUp], handler: {
             (event: NSEvent) in
             switch event.type {
             case .mouseMoved:
@@ -67,7 +68,7 @@ class AppDelegate: NSObject, NSApplicationDelegate {
         NSApp.terminate(nil)
     }
     
-    fileprivate func promptToAddLoginItems() {
+    private func promptToAddLoginItems() {
         let alert = NSAlert()
         alert.messageText = LocalizedString.LaunchFuwari.value
         alert.informativeText = LocalizedString.LaunchSettingInfo.value
@@ -77,18 +78,18 @@ class AppDelegate: NSObject, NSApplicationDelegate {
         NSApp.activate(ignoringOtherApps: true)
         
         //  Launch on system startup
-        if alert.runModal() == NSAlertFirstButtonReturn {
+        if alert.runModal() == NSApplication.ModalResponse.alertFirstButtonReturn {
             defaults.set(true, forKey: Constants.UserDefaults.loginItem)
             toggleLoginItemState()
         }
         // Do not show this message again
-        if alert.suppressionButton?.state == NSOnState {
+        if alert.suppressionButton?.state == .on {
             defaults.set(true, forKey: Constants.UserDefaults.suppressAlertForLoginItem)
         }
         defaults.synchronize()
     }
     
-    fileprivate func toggleAddingToLoginItems(_ enable: Bool) {
+    private func toggleAddingToLoginItems(_ enable: Bool) {
         let appPath = Bundle.main.bundlePath
         LoginServiceKit.removeLoginItems(at: appPath)
         if enable {
@@ -96,7 +97,7 @@ class AppDelegate: NSObject, NSApplicationDelegate {
         }
     }
     
-    fileprivate func toggleLoginItemState() {
+    private func toggleLoginItemState() {
         let isInLoginItems = defaults.bool(forKey: Constants.UserDefaults.loginItem)
         toggleAddingToLoginItems(isInLoginItems)
     }
diff --git a/Fuwari/Base.lproj/Localizable.strings b/Fuwari/Base.lproj/Localizable.strings
index 04921c5..18d71ea 100644
--- a/Fuwari/Base.lproj/Localizable.strings
+++ b/Fuwari/Base.lproj/Localizable.strings
@@ -31,3 +31,13 @@
 "Capture" = "Capture";
 
 "About" = "About Fuwari...";
+
+"Save" = "Save";
+
+"Copy" = "Copy";
+
+"Close" = "Close";
+
+"Zoom In" = "Zoom In";
+
+"Zoom Out" = "Zoom Out";
diff --git a/Fuwari/CaptureGuideView.swift b/Fuwari/CaptureGuideView.swift
index e116b54..bc5976e 100644
--- a/Fuwari/CaptureGuideView.swift
+++ b/Fuwari/CaptureGuideView.swift
@@ -55,27 +55,27 @@ class CaptureGuideView: NSView {
         if startPoint != .zero {
             NSColor(red: 0, green: 0, blue: 0, alpha: 0.25).set()
             guideWindowRect = NSRect(x: floor(fmin(startPoint.x, cursorPoint.x)), y: floor(fmin(startPoint.y, cursorPoint.y)), width: floor(fabs(cursorPoint.x - startPoint.x)), height: floor(fabs(cursorPoint.y - startPoint.y)))
-            NSRectFill(guideWindowRect)
+            guideWindowRect.fill()
             
             NSColor.white.set()
-            NSFrameRectWithWidth(guideWindowRect, cursorGuideWidth)
+            guideWindowRect.frame(withWidth: cursorGuideWidth)
         }
     }
     
     private func drawCursor() {
         NSColor.darkGray.set()
         let cursorRectWidth = NSRect(x: cursorPoint.x - cursorSize / 2, y: cursorPoint.y, width: cursorSize, height: 1)
-        NSRectFill(cursorRectWidth)
+        cursorRectWidth.fill()
         let cursorRectHeight = NSRect(x: cursorPoint.x, y: cursorPoint.y - cursorSize / 2, width: 1, height: cursorSize)
-        NSRectFill(cursorRectHeight)
+        cursorRectHeight.fill()
         
         NSColor(red: 0, green: 0, blue: 0, alpha: 0.25).set()
         let cursorCenter = NSRect(x: cursorPoint.x - cursorSize / 4 + cursorGuideWidth / 2, y: cursorPoint.y - cursorSize / 4 + cursorGuideWidth / 2, width: cursorSize / 2, height: cursorSize / 2)
         let path = NSBezierPath(ovalIn: cursorCenter)
         path.fill()
         
-        (Int(cursorPoint.x).description as NSString).draw(at: NSPoint(x: cursorPoint.x + cursorSize / 2, y: cursorPoint.y - cursorSize / 2), withAttributes: [NSFontAttributeName : cursorFont, NSShadowAttributeName : coordinateLabelShadow])
-        (Int(frame.height - cursorPoint.y).description as NSString).draw(at: NSPoint(x: cursorPoint.x + cursorSize / 2, y: cursorPoint.y - cursorSize), withAttributes: [NSFontAttributeName : cursorFont, NSShadowAttributeName : coordinateLabelShadow])
+        (Int(cursorPoint.x).description as NSString).draw(at: NSPoint(x: cursorPoint.x + cursorSize / 2, y: cursorPoint.y - cursorSize / 2), withAttributes: [.font : cursorFont, .shadow : coordinateLabelShadow])
+        (Int(frame.height - cursorPoint.y).description as NSString).draw(at: NSPoint(x: cursorPoint.x + cursorSize / 2, y: cursorPoint.y - cursorSize), withAttributes: [.font : cursorFont, .shadow : coordinateLabelShadow])
     }
     
     func reset() {
diff --git a/Fuwari/FloatWindow.swift b/Fuwari/FloatWindow.swift
index 3ad4358..9cf12fd 100644
--- a/Fuwari/FloatWindow.swift
+++ b/Fuwari/FloatWindow.swift
@@ -7,8 +7,14 @@
 //
 
 import Cocoa
+import Magnet
 import Carbon
 
+protocol FloatDelegate {
+    func save(floatWindow: FloatWindow, image: CGImage)
+    func close(floatWindow: FloatWindow)
+}
+
 class FloatWindow: NSWindow {
 
     override var canBecomeKey: Bool { return true }
@@ -16,65 +22,73 @@ class FloatWindow: NSWindow {
 
     var floatDelegate: FloatDelegate?
     
-    init(contentRect: NSRect, styleMask style: NSWindowStyleMask = .borderless, backing bufferingType: NSBackingStoreType = .buffered, defer flag: Bool = false, image: CGImage) {
+    private var originalRect = NSRect()
+    private var popUpLabel = NSTextField()
+    private var windowScale = CGFloat(1.0)
+    private let windowScaleInterval = CGFloat(0.25)
+    private let minWindowScale = CGFloat(0.25)
+    private let maxWindowScale = CGFloat(2.5)
+    
+    init(contentRect: NSRect, styleMask style: NSWindow.StyleMask = .borderless, backing bufferingType: NSWindow.BackingStoreType = .buffered, defer flag: Bool = false, image: CGImage) {
         super.init(contentRect: contentRect, styleMask: style, backing: bufferingType, defer: flag)
         
-        level = Int(CGWindowLevelForKey(.floatingWindow))
+        originalRect = contentRect
+        level = NSWindow.Level(rawValue: Int(CGWindowLevelForKey(.floatingWindow)))
         isMovableByWindowBackground = true
         hasShadow = true
         contentView?.wantsLayer = true
         contentView?.layer?.contents = image
         
-        fade(isIn: true, completion: nil)
+        popUpLabel = NSTextField(frame: NSRect(x: 10, y: 10, width: 80, height: 26))
+        popUpLabel.textColor = .white
+        popUpLabel.font = NSFont.boldSystemFont(ofSize: 20)
+        popUpLabel.alignment = .center
+        popUpLabel.drawsBackground = true
+        popUpLabel.backgroundColor = NSColor(red: 0.0, green: 0.0, blue: 0.0, alpha: 0.4)
+        popUpLabel.wantsLayer = true
+        popUpLabel.layer?.cornerRadius = 10.0
+        popUpLabel.isBordered = false
+        popUpLabel.isEditable = false
+        popUpLabel.isSelectable = false
+        popUpLabel.alphaValue = 0.0
+        contentView?.addSubview(popUpLabel)
+        
+        menu = NSMenu()
+        menu?.addItem(NSMenuItem(title: LocalizedString.Save.value, action: #selector(saveImage), keyEquivalent: "s"))
+        menu?.addItem(NSMenuItem(title: LocalizedString.Copy.value, action: #selector(copyImage), keyEquivalent: "c"))
+        menu?.addItem(NSMenuItem.separator())
+        menu?.addItem(NSMenuItem(title: LocalizedString.ZoomIn.value, action: #selector(zoomInWindow), keyEquivalent: "+"))
+        menu?.addItem(NSMenuItem(title: LocalizedString.ZoomOut.value, action: #selector(zoomOutWindow), keyEquivalent: "-"))
+        menu?.addItem(NSMenuItem.separator())
+        menu?.addItem(NSMenuItem(title: LocalizedString.Close.value, action: #selector(closeWindow), keyEquivalent: "w"))
+        
+        fadeWindow(isIn: true)
     }
     
     override func keyDown(with event: NSEvent) {
-        super.keyDown(with: event)
+        if StateManager.shared.isCapturing {
+            return
+        }
         
-        if event.modifierFlags.rawValue & NSEventModifierFlags.command.rawValue != 0 {
-            switch event.keyCode {
-            case UInt16(kVK_ANSI_S):
-                let saveLabel = NSTextField(frame: NSRect(x: 10, y: 10, width: 80, height: 26))
-                saveLabel.stringValue = "Save"
-                saveLabel.textColor = .white
-                saveLabel.font = NSFont.boldSystemFont(ofSize: 20)
-                saveLabel.alignment = .center
-                saveLabel.drawsBackground = true
-                saveLabel.backgroundColor = NSColor(red: 0.0, green: 0.0, blue: 0.0, alpha: 0.4)
-                saveLabel.wantsLayer = true
-                saveLabel.layer?.cornerRadius = 10.0
-                saveLabel.isBordered = false
-                saveLabel.isEditable = false
-                saveLabel.isSelectable = false
-                contentView?.addSubview(saveLabel)
-                
-                DispatchQueue.main.asyncAfter(deadline: .now()) {
-                    if let image = self.contentView?.layer?.contents {
-                        saveLabel.removeFromSuperview()
-                        self.floatDelegate?.save(floatWindow: self, image: image as! CGImage)
-                    }
-                }
-            case UInt16(kVK_ANSI_W):
-                fade(isIn: false) {
-                    self.floatDelegate?.close(floatWindow: self)
-                }
-            case UInt16(kVK_ANSI_C):
-                DispatchQueue.main.asyncAfter(deadline: .now()) {
-                    if let image = self.contentView?.layer?.contents {
-                        let cgImage = image as! CGImage
-                        let size = CGSize(width: cgImage.width, height: cgImage.height)
-                        let nsImage = NSImage(cgImage: cgImage, size: size)
-                        NSPasteboard.general().clearContents()
-                        NSPasteboard.general().writeObjects([nsImage])
-                    }
-                }
+        let combo = KeyCombo(keyCode: Int(event.keyCode), cocoaModifiers: event.modifierFlags)
+        if event.modifierFlags.rawValue & NSEvent.ModifierFlags.command.rawValue != 0 {
+            guard let char = combo?.characters.first else { return }
+            switch char {
+            case "S": // ⌘S
+                saveImage()
+            case "C": // ⌘C
+                copyImage()
+            case "=": // ⌘+
+                zoomInWindow()
+            case "-": // ⌘-
+                zoomOutWindow()
+            case "W": // ⌘W
+                closeWindow()
             default:
                 break
             }
         } else if event.keyCode == UInt16(kVK_Escape) {
-            fade(isIn: false) {
-                self.floatDelegate?.close(floatWindow: self)
-            }
+            closeWindow()
         }
     }
     
@@ -86,18 +100,78 @@ class FloatWindow: NSWindow {
         alphaValue = 1.0
     }
     
-    private func fade(isIn: Bool, completion: (() -> Void)?) {
-        alphaValue = isIn ? 0.0 : 1.0
+    override func rightMouseDown(with event: NSEvent) {
+        if let menu = menu, let contentView = contentView {
+            NSMenu.popUpContextMenu(menu, with: event, for: contentView)
+        }
+    }
+    
+    @objc private func saveImage() {
+        DispatchQueue.main.asyncAfter(deadline: .now()) {
+            if let image = self.contentView?.layer?.contents {
+                self.showPopUp(text: "Save")
+                self.floatDelegate?.save(floatWindow: self, image: image as! CGImage)
+            }
+        }
+    }
+    
+    @objc private func copyImage() {
+        DispatchQueue.main.asyncAfter(deadline: .now()) {
+            if let image = self.contentView?.layer?.contents {
+                let cgImage = image as! CGImage
+                let size = CGSize(width: cgImage.width, height: cgImage.height)
+                let nsImage = NSImage(cgImage: cgImage, size: size)
+                NSPasteboard.general.clearContents()
+                NSPasteboard.general.writeObjects([nsImage])
+                self.showPopUp(text: "Copy")
+            }
+        }
+    }
+    
+    @objc private func zoomInWindow() {
+        if windowScale < maxWindowScale {
+            windowScale += windowScaleInterval
+            setFrame(NSRect(x: frame.origin.x - (originalRect.width / 2 * windowScaleInterval), y: frame.origin.y - (originalRect.height / 2 * windowScaleInterval), width: originalRect.width * windowScale, height: originalRect.height * windowScale), display: true)
+        }
+        
+        showPopUp(text: "\(Int(windowScale * 100))%")
+    }
+    
+    @objc private func zoomOutWindow() {
+        if windowScale > minWindowScale {
+            windowScale -= windowScaleInterval
+            setFrame(NSRect(x: frame.origin.x + (originalRect.width / 2 * windowScaleInterval), y: frame.origin.y + (originalRect.height / 2 * windowScaleInterval), width: originalRect.width * windowScale, height: originalRect.height * windowScale), display: true)
+        }
+        
+        showPopUp(text: "\(Int(windowScale * 100))%")
+    }
+    
+    @objc private func closeWindow() {
+        floatDelegate?.close(floatWindow: self)
+    }
+    
+    private func showPopUp(text: String, duration: Double = 0.3) {
+        popUpLabel.stringValue = text
+        
+        NSAnimationContext.runAnimationGroup({ context in
+            context.duration = duration
+            context.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseOut)
+            popUpLabel.animator().alphaValue = 1.0
+        }) {
+            NSAnimationContext.runAnimationGroup({ context in
+                context.duration = duration
+                context.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseIn)
+                self.popUpLabel.animator().alphaValue = 0.0
+            })
+        }
+    }
+    
+    func fadeWindow(isIn: Bool, completion: (() -> Void)? = nil) {
         makeKeyAndOrderFront(self)
         NSAnimationContext.beginGrouping()
-        NSAnimationContext.current().completionHandler = completion
-        NSAnimationContext.current().duration = 0.2
+        NSAnimationContext.current.completionHandler = completion
+        NSAnimationContext.current.duration = 0.2
         animator().alphaValue = isIn ? 1.0 : 0.0
         NSAnimationContext.endGrouping()
     }
 }
-
-protocol FloatDelegate {
-    func save(floatWindow: FloatWindow, image: CGImage)
-    func close(floatWindow: FloatWindow)
-}
diff --git a/Fuwari/FullScreenWindow.swift b/Fuwari/FullScreenWindow.swift
index f4b4797..fe21492 100644
--- a/Fuwari/FullScreenWindow.swift
+++ b/Fuwari/FullScreenWindow.swift
@@ -9,6 +9,11 @@
 import Cocoa
 import Carbon
 
+protocol CaptureDelegate {
+    func didCanceled()
+    func didCaptured(rect: NSRect, image: CGImage)
+}
+
 class FullScreenWindow: NSWindow {
     
     var captureDelegate: CaptureDelegate?
@@ -19,10 +24,10 @@ class FullScreenWindow: NSWindow {
     }()
     
     private var mouseLocation: NSPoint {
-        return NSPoint(x: NSEvent.mouseLocation().x - frame.origin.x, y: NSEvent.mouseLocation().y - frame.origin.y)
+        return NSPoint(x: NSEvent.mouseLocation.x - frame.origin.x, y: NSEvent.mouseLocation.y - frame.origin.y)
     }
     
-    override init(contentRect: NSRect, styleMask style: NSWindowStyleMask, backing bufferingType: NSBackingStoreType, defer flag: Bool) {
+    override init(contentRect: NSRect, styleMask style: NSWindow.StyleMask, backing bufferingType: NSWindow.BackingStoreType, defer flag: Bool) {
         super.init(contentRect: contentRect, styleMask: .borderless, backing: .buffered, defer: false)
         
         isReleasedWhenClosed = true
@@ -32,7 +37,7 @@ class FullScreenWindow: NSWindow {
         hasShadow = false
         ignoresMouseEvents = false
         acceptsMouseMovedEvents = true
-        level = Int(CGWindowLevelForKey(.assistiveTechHighWindow))
+        level = NSWindow.Level(rawValue: Int(CGWindowLevelForKey(.assistiveTechHighWindow)))
         makeKeyAndOrderFront(self)
         
         contentView = captureGuideView
@@ -40,7 +45,9 @@ class FullScreenWindow: NSWindow {
         NSEvent.addLocalMonitorForEvents(matching: .keyDown) {
             (event: NSEvent) -> NSEvent? in
             if event.keyCode == UInt16(kVK_Escape) {
-                self.captureDelegate?.didCanceled()
+                if StateManager.shared.isCapturing {
+                    self.captureDelegate?.didCanceled()
+                }
             }
             return event
         }
@@ -83,8 +90,3 @@ class FullScreenWindow: NSWindow {
         captureDelegate?.didCaptured(rect: rect.offsetBy(dx: frame.origin.x, dy: frame.origin.y), image: cgImage)
     }
 }
-
-protocol CaptureDelegate {
-    func didCanceled()
-    func didCaptured(rect: NSRect, image: CGImage)
-}
diff --git a/Fuwari/HotKeyManager.swift b/Fuwari/HotKeyManager.swift
index 8e5dfac..0107658 100644
--- a/Fuwari/HotKeyManager.swift
+++ b/Fuwari/HotKeyManager.swift
@@ -27,9 +27,7 @@ final class HotKeyManager: NSObject {
     }()
     fileprivate(set) var captureHotKey: HotKey?
     
-    override init() {
-        super.init()
-        
+    func configure() {
         registerHotKey(keyCombo: captureKeyCombo)
     }
 }
diff --git a/Fuwari/Info.plist b/Fuwari/Info.plist
index 3f49489..048a929 100644
--- a/Fuwari/Info.plist
+++ b/Fuwari/Info.plist
@@ -17,9 +17,9 @@
 	<key>CFBundlePackageType</key>
 	<string>APPL</string>
 	<key>CFBundleShortVersionString</key>
-	<string>0.3</string>
+	<string>0.4</string>
 	<key>CFBundleVersion</key>
-	<string>0.3</string>
+	<string>0.40</string>
 	<key>Fabric</key>
 	<dict>
 		<key>APIKey</key>
diff --git a/Fuwari/LocalizedString.swift b/Fuwari/LocalizedString.swift
index 4b8a7b3..bb0c656 100644
--- a/Fuwari/LocalizedString.swift
+++ b/Fuwari/LocalizedString.swift
@@ -18,6 +18,11 @@ enum LocalizedString: String {
     case DontLaunch        = "Don't Launch"
     case Capture           = "Capture"
     case About             = "About"
+    case Save              = "Save"
+    case Copy              = "Copy"
+    case Close             = "Close"
+    case ZoomIn            = "ZoomIn"
+    case ZoomOut           = "ZoomOut"
     
     case TabGeneral        = "General"
     case TabMenu           = "Menu"
diff --git a/Fuwari/MenuManager.swift b/Fuwari/MenuManager.swift
index 95be665..1eae679 100644
--- a/Fuwari/MenuManager.swift
+++ b/Fuwari/MenuManager.swift
@@ -12,13 +12,13 @@ import Magnet
 class MenuManager: NSObject {
 
     static let shared = MenuManager()
-    let statusItem = NSStatusBar.system().statusItem(withLength: NSSquareStatusItemLength)
+    let statusItem = NSStatusBar.system.statusItem(withLength: NSStatusItem.squareLength)
     
     private var captureItem = NSMenuItem()
 
     func configure() {
         if let button = statusItem.button {
-            button.image = NSImage(named: "MenuIcon")
+            button.image = NSImage(named: NSImage.Name(rawValue: "MenuIcon"))
         }
         
         captureItem = NSMenuItem(title: LocalizedString.Capture.value, action: #selector(AppDelegate.capture), keyEquivalent: HotKeyManager.shared.captureKeyCombo.characters.lowercased())
diff --git a/Fuwari/PreferencesWindowController.swift b/Fuwari/PreferencesWindowController.swift
index a3acaaa..27f5d91 100644
--- a/Fuwari/PreferencesWindowController.swift
+++ b/Fuwari/PreferencesWindowController.swift
@@ -10,7 +10,7 @@ import Cocoa
 
 class PreferencesWindowController: NSWindowController {
 
-    static let shared = PreferencesWindowController(windowNibName: "PreferencesWindowController")
+    static let shared = PreferencesWindowController(windowNibName: NSNib.Name(rawValue: "PreferencesWindowController"))
     
     @IBOutlet fileprivate weak var toolBar: NSView!
     @IBOutlet fileprivate weak var generalImageView: NSImageView!
@@ -24,9 +24,9 @@ class PreferencesWindowController: NSWindowController {
     @IBOutlet fileprivate weak var shortcutButton: NSButton!
     
     fileprivate let defaults = UserDefaults.standard
-    fileprivate let viewController = [NSViewController(nibName: "GeneralPreferenceViewController", bundle: nil)!,
-                                      UpdatePreferenceViewController(nibName: "UpdatePreferenceViewController", bundle: nil)!,
-                                      ShortcutsPreferenceViewController(nibName: "ShortcutsPreferenceViewController", bundle: nil)!]
+    fileprivate let viewController = [NSViewController(nibName: NSNib.Name(rawValue: "GeneralPreferenceViewController"), bundle: nil),
+                                      UpdatePreferenceViewController(nibName: NSNib.Name(rawValue: "UpdatePreferenceViewController"), bundle: nil),
+                                      ShortcutsPreferenceViewController(nibName: NSNib.Name(rawValue: "ShortcutsPreferenceViewController"), bundle: nil)]
     
     override func windowDidLoad() {
         super.windowDidLoad()
@@ -64,9 +64,9 @@ extension PreferencesWindowController: NSWindowDelegate {
 // MARK: - Layout
 fileprivate extension PreferencesWindowController {
     private func resetImages() {
-        generalImageView.image = NSImage(named: Constants.ImageName.generalOff)
-        updatesImageView.image = NSImage(named: Constants.ImageName.updatesOff)
-        shortcutImageView.image = NSImage(named: Constants.ImageName.shortcutOff)
+        generalImageView.image = NSImage(named: NSImage.Name(rawValue: Constants.ImageName.generalOff))
+        updatesImageView.image = NSImage(named: NSImage.Name(rawValue: Constants.ImageName.updatesOff))
+        shortcutImageView.image = NSImage(named: NSImage.Name(rawValue: Constants.ImageName.shortcutOff))
         
         generalTextField.textColor = .tabTitle
         updatesTextField.textColor = .tabTitle
@@ -78,13 +78,13 @@ fileprivate extension PreferencesWindowController {
         
         switch index {
         case 0:
-            generalImageView.image = NSImage(named: Constants.ImageName.generalOn)
+            generalImageView.image = NSImage(named: NSImage.Name(rawValue: Constants.ImageName.generalOn))
             generalTextField.textColor = .main
         case 1:
-            updatesImageView.image = NSImage(named: Constants.ImageName.updatesOn)
+            updatesImageView.image = NSImage(named: NSImage.Name(rawValue: Constants.ImageName.updatesOn))
             updatesTextField.textColor = .main
         case 2:
-            shortcutImageView.image = NSImage(named: Constants.ImageName.shortcutOn)
+            shortcutImageView.image = NSImage(named: NSImage.Name(rawValue: Constants.ImageName.shortcutOn))
             shortcutTextField.textColor = .main
         default: break
         }
diff --git a/Fuwari/StateManager.swift b/Fuwari/StateManager.swift
new file mode 100644
index 0000000..86534d1
--- /dev/null
+++ b/Fuwari/StateManager.swift
@@ -0,0 +1,14 @@
+//
+//  StateManager.swift
+//  Fuwari
+//
+//  Created by Kengo Yokoyama on 2018/04/30.
+//  Copyright © 2018年 AppKnop. All rights reserved.
+//
+
+import Cocoa
+
+class StateManager: NSObject {
+    static let shared = StateManager()
+    var isCapturing = false
+}
diff --git a/Fuwari/ViewController.swift b/Fuwari/ViewController.swift
index 5c0cc6d..818fb2c 100644
--- a/Fuwari/ViewController.swift
+++ b/Fuwari/ViewController.swift
@@ -7,16 +7,18 @@
 //
 
 import Cocoa
+import Quartz
 
 class ViewController: NSViewController {
 
-    fileprivate var windowControllers = [NSWindowController]()
-    fileprivate var fullScreenWindows = [FullScreenWindow]()
+    private var windowControllers = [NSWindowController]()
+    private var fullScreenWindows = [FullScreenWindow]()
+    private var isCancelled = false
     
     override func viewDidLoad() {
         super.viewDidLoad()
         
-        NSScreen.screens()!.forEach {
+        NSScreen.screens.forEach {
             let fullScreenWindow = FullScreenWindow(contentRect: $0.frame, styleMask: .borderless, backing: .buffered, defer: false)
             fullScreenWindow.captureDelegate = self
             fullScreenWindows.append(fullScreenWindow)
@@ -29,7 +31,11 @@ class ViewController: NSViewController {
         NotificationCenter.default.addObserver(self, selector: #selector(startCapture), name: Notification.Name(rawValue: Constants.Notification.capture), object: nil)
     }
     
-    fileprivate func createFloatWindow(rect: NSRect, image: CGImage) {
+    deinit {
+        NotificationCenter.default.removeObserver(self, name: Notification.Name(rawValue: Constants.Notification.capture), object: nil)
+    }
+    
+    private func createFloatWindow(rect: NSRect, image: CGImage) {
         let floatWindow = FloatWindow(contentRect: rect, image: image)
         floatWindow.floatDelegate = self
         let floatWindowController = NSWindowController(window: floatWindow)
@@ -39,7 +45,7 @@ class ViewController: NSViewController {
     
     @objc private func startCapture() {
         NSCursor.hide()
-        
+        StateManager.shared.isCapturing = true
         fullScreenWindows.forEach { $0.startCapture() }
     }
 }
@@ -48,18 +54,29 @@ extension ViewController: CaptureDelegate {
     func didCaptured(rect: NSRect, image: CGImage) {
         createFloatWindow(rect: rect, image: image)
         NSCursor.unhide()
+        StateManager.shared.isCapturing = false
         fullScreenWindows.forEach { $0.orderOut(nil) }
+        isCancelled = false
     }
     
     func didCanceled() {
         NSCursor.unhide()
+        StateManager.shared.isCapturing = false
+        isCancelled = true
         fullScreenWindows.forEach { $0.orderOut(nil) }
     }
 }
 
 extension ViewController: FloatDelegate {
     func close(floatWindow: FloatWindow) {
-        windowControllers.filter({ $0.window === floatWindow }).first?.close()
+        if !isCancelled {
+            if windowControllers.filter({ $0.window === floatWindow }).first != nil {
+                floatWindow.fadeWindow(isIn: false) {
+                    floatWindow.close()
+                }
+            }
+        }
+        isCancelled = false
     }
 
     func save(floatWindow: FloatWindow, image: CGImage) {
@@ -69,19 +86,17 @@ extension ViewController: FloatDelegate {
         let savePanel = NSSavePanel()
         savePanel.canCreateDirectories = true
         savePanel.showsTagField = false
-        savePanel.nameFieldStringValue = "screenshot-\(formatter.string(from: Date())).png"
-        savePanel.level = Int(CGWindowLevelForKey(.modalPanelWindow))
-        savePanel.begin { (result) in
-            if result == NSFileHandlingPanelOKButton {
-                guard let url = savePanel.url else { return }
-                
-                let bitmapRep = NSBitmapImageRep(cgImage: image)
-                let data = bitmapRep.representation(using: .PNG, properties: [:])
-                do {
-                    try data?.write(to: url, options: .atomicWrite)
-                } catch {
-                    print(error.localizedDescription)
-                }
+        savePanel.nameFieldStringValue = "screenshot-\(formatter.string(from: Date()))"
+        savePanel.level = NSWindow.Level(rawValue: Int(CGWindowLevelForKey(.modalPanelWindow)))
+        let saveOptions = IKSaveOptions(imageProperties: [:], imageUTType: kUTTypePNG as String?)
+        saveOptions?.addAccessoryView(to: savePanel)
+        
+        let result = savePanel.runModal()
+        if result == .OK {
+            if let url = savePanel.url as CFURL?, let type = saveOptions?.imageUTType as CFString? {
+                guard let destination = CGImageDestinationCreateWithURL(url, type, 1, nil) else { return }
+                CGImageDestinationAddImage(destination, image, saveOptions!.imageProperties! as CFDictionary)
+                CGImageDestinationFinalize(destination)
             }
         }
     }
diff --git a/Fuwari/ja.lproj/Localizable.strings b/Fuwari/ja.lproj/Localizable.strings
index bbdb957..21a2a1b 100644
--- a/Fuwari/ja.lproj/Localizable.strings
+++ b/Fuwari/ja.lproj/Localizable.strings
@@ -31,3 +31,13 @@
 "Capture" = "キャプチャ";
 
 "About" = "Fuwariについて...";
+
+"Save" = "保存";
+
+"Copy" = "コピー";
+
+"Close" = "閉じる";
+
+"Zoom In" = "拡大";
+
+"Zoom Out" = "縮小";
diff --git a/README.md b/README.md
index 133ed01..b5c8c78 100644
--- a/README.md
+++ b/README.md
@@ -10,8 +10,8 @@ Floating screenshot like a sticky.
 </p>
 
 ## Requirement
-- Swift3+
-- Xcode8+
+- Swift4+
+- Xcode9.3+
 
 ## Contributing
 1. Fork it ( https://github.com/kentya6/Fuwari/fork )
@@ -24,7 +24,7 @@ Floating screenshot like a sticky.
 
 The MIT License (MIT)
 
-Copyright (c) 2016 Kengo YOKOYAMA
+Copyright (c) 2018 Kengo YOKOYAMA
 
 ## Author