diff --git a/basic.pdf b/basic.pdf
index 7c3bb7a..7028954 100644
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diff --git a/manual.pdf b/manual.pdf
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diff --git a/manual.typ b/manual.typ
index 6bde365..66abd4a 100644
--- a/manual.typ
+++ b/manual.typ
@@ -466,12 +466,8 @@ The `thmbox` wraps `thmenv`, supplying a box-like `fmt` function.
 #let thmbox(
   identifier,             // identifier
   head,                   // head - common name, used in the title
+  ..blockargs,            // named arguments, passed to #block
   supplement: auto,       // supplement for references, defaults to "head"
-  fill: none,             // box fill
-  stroke: none,           // box stroke
-  inset: 1.2em,           // box inset
-  radius: 0.3em,          // box corner radius
-  breakable: false,       // box breakability
   padding: (top: 0.5em, bottom: 0.5em),
                           // box padding, passed to #pad
   namefmt: x => [(#x)],   // formatting for name
@@ -484,6 +480,16 @@ The `thmbox` wraps `thmenv`, supplying a box-like `fmt` function.
 ) = { ... }
 ```
 
+The `thmbox` function sets the following defaults for the `block`.
+```typst
+(
+  width: 100%,
+  inset: 1.2em,
+  radius: 0.3em,
+  breakable: false,
+)
+```
+
 The `thmplain` function is identical to `thmbox`, except with plainer
 defaults.
 
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