diff --git a/src/component/form.lisp b/src/component/form.lisp
index d93ceb8..48beae2 100644
--- a/src/component/form.lisp
+++ b/src/component/form.lisp
@@ -63,6 +63,8 @@
 
 (in-package :dev.metalisp.sbt/component/form)
 
+;;; checkable
+
 (defvar checkable-elements
   '("radio" "checkbox")
   "List of checkable specific input elements ")
@@ -118,6 +120,8 @@ checkable macros."
 
 (define-checkables)
 
+;;; ctrl
+
 (defvar ctrl-elements
   '("button" "checkbox" "color" "date" "datetime-local" "email" "file" "hidden"
     "image" "month" "number" "password" "radio" "range" "reset" "search" "submit"
@@ -182,6 +186,8 @@ checkable macros."
 
 (define-ctrls)
 
+;;; combo
+
 (defmacro combo ((&key size multiple) &body body)
   "This macro generates a Bootstrap select dropdown menu.
 
@@ -235,6 +241,8 @@ macros."
 
 (define-combos)
 
+;;; other
+
 (defun search-form ()
   "This function generates a general-purpose search form.