Re: How to temporarily show an image in an Emacs buffer?

[Marcin Borkowski]

On 2023-03-12, at 04:37, Michael Heerdegen <michael_heerdegen@web.de> wrote:

> Marcin Borkowski <mbork@mbork.pl> writes:
>
>> I didn't experiment with this, but I'm afraid that interlacing changes
>> to the buffer done by the user (when recording undo changes) and by the
>> Elisp code (while `buffer-undo-list' is bound to `t') may result in
>> undoing being impossible.
>
> Yes, what is allowed is very limited.  AFAIU anything changing any
> positions is already very bad (undo positions are numbers, not markers).

Thanks, that confirms my reservations, and shows that overlays are the
way to go.

Best,

-- 
Marcin Borkowski
http://mbork.pl