Docs: clears misunderstanding on where Macros can be used (sezanzeb#973)

* Docs: clears misunderstanding on where Macros can be used

* Apply suggestions from code review

Co-authored-by: Tobi <28510156+sezanzeb@users.noreply.github.com>

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Co-authored-by: Tobi <28510156+sezanzeb@users.noreply.github.com>

readme/usage.md

@@ -13,10 +13,10 @@ as shown in the screenshots below.
   <img src="usage_2.png"/>
 </p>
 
-In the text input field, type the key to which you would like to map this input.
+In the "Output" textbox on the right, type the key to which you would like to map this input.
 More information about the possible mappings can be found in 
 [examples.md](./examples.md) and [below](#key-names). You can also write your macro 
-into the text input field. If you hit enter, it will switch to a multiline-editor with
+into the "Output" textbox. If you hit enter, it will switch to a multiline-editor with
 line-numbers.
 
 Changes are saved automatically. Press the "Apply" button to activate (inject) the