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-rw-r--r--lisp/custom.el2
1 files changed, 2 insertions, 0 deletions
diff --git a/lisp/custom.el b/lisp/custom.el
index d9d0898dcb7..bc155d32dd0 100644
--- a/lisp/custom.el
+++ b/lisp/custom.el
@@ -237,6 +237,8 @@ The following keywords are meaningful:
:type VALUE should be a widget type for editing the symbol's value.
Every `defcustom' should specify a value for this keyword.
+ See `(elisp) Customization Types' for a list of base types
+ and useful composite types.
:options VALUE should be a list of valid members of the widget type.
:initialize
VALUE should be a function used to initialize the