(setq str "Hello\nAgain")
(setq str-ext (make-extent 0 5 str))
(set-extent-begin-glyph 
 str-ext
 (make-glyph [xpm :file "../etc/xemacs-icon.xpm"]))
(set-extent-property str-ext 'mouse-face 'highlight)

(setq str2 "Hello\n")
(setq str2-ext (make-extent 0 1 str2))
(set-extent-begin-glyph
 str2-ext
 (make-glyph 
  [button :width 5 :height 1
	  :face modeline-mousable
	  :callback (set-specifier bottom-gutter-visible-p '(str2))
	  :descriptor "ok" :selected t]))

(set-specifier bottom-gutter-height 'autodetect)
(set-specifier bottom-gutter-border-width 2)
(set-gutter-element bottom-gutter 'str str)
(set-gutter-element bottom-gutter 'str2 str2)
(set-gutter-element-visible-p bottom-gutter-visible-p 'str t)
(set-gutter-element-visible-p bottom-gutter-visible-p 'str2 t)