; Outline-minor-mode key map
 (define-prefix-command 'cm-map nil "Outline-")
 ; HIDE
 (define-key cm-map "t" 'hide-body)         ; Hide everything but headings (all body lines)
 (define-key cm-map "c" 'hide-entry)        ; Hide this entry's body
 ; SHOW
 (define-key cm-map "a" 'show-all)          ; Show (expand) everything
 (define-key cm-map "e" 'show-entry)        ; Show this heading's body

 (global-set-key "\M-o" cm-map)