Re: Editing change groups

[Ben Bacarisse]

Michael Heerdegen <michael_heerdegen@web.de> writes:

> I have the following requirement for a user interface: if the user hits
> a key, something in the buffer is replaced with something else.  Doing
> this potentially involves several editing operations.  If the user hits
> the same key again, the old contents are restored.

Would fiddling with the undo mechanism not be a better way to do this?

https://www.gnu.org/software/emacs/manual/html_node/elisp/Undo.html

I've never tried to do what you ask this way (so I'm, just speculating)
but it looks like one place to start.

-- 
Ben.