What do these entries in 'show-commands' mean?

[Chris Green]

In the 'show-commands' output there are entries like the following:-

"edit-file"                     ^X-e
  or    "E"
  or    "e" 
  or    "find-file"
  ( bring given (or under-cursor) file or existing buffer into window )

I know that CTRL-X plus e opens the file under the cursor for editing,
but what do the other entries mean?  Ah, I think I understand,
"edit-file", "E", "e" and "find-file" are effectively 'synonymns' for
the same action (they can be entered at the : prompt).  ^X-e invokes
that command from command mode.


Is there an easy way to list all the single character command-mode keys?

-- 
Chris Green