- "A list of MIME types to be displayed automatically.")
-
-(defvar mm-attachment-override-types '("text/x-vcard")
- "Types that should have \"attachment\" ignored if they can be displayed inline.")
-
-(defvar mm-inline-override-types nil
- "Types that should be treated as attachments even if they can be displayed inline.")
-
-(defvar mm-inline-override-types nil
- "Types that should be treated as attachments even if they can be displayed inline.")
-
-(defvar mm-automatic-external-display nil
- "List of MIME type regexps that will be displayed externally automatically.")
-
-(defvar mm-discouraged-alternatives nil
+ "A list of MIME types to be displayed automatically."
+ :type '(repeat string)
+ :group 'mime-display)
+
+(defcustom mm-attachment-override-types '("text/x-vcard")
+ "Types to have \"attachment\" ignored if they can be displayed inline."
+ :type '(repeat string)
+ :group 'mime-display)
+
+(defcustom mm-inline-override-types nil
+ "Types to be treated as attachments even if they can be displayed inline."
+ :type '(repeat string)
+ :group 'mime-display)
+
+(defcustom mm-inline-override-types nil
+ "Types to be treated as attachments even if they can be displayed inline."
+ :type '(repeat string)
+ :group 'mime-display)
+
+(defcustom mm-automatic-external-display nil
+ "List of MIME type regexps that will be displayed externally automatically."
+ :type '(repeat string)
+ :group 'mime-display)
+
+(defcustom mm-discouraged-alternatives nil