Am 08.06.22 um 19:18 schrieb Eli Zaretskii:
>> Date: Wed, 8 Jun 2022 18:53:13 +0200
>> From: Andreas Röhler<andreas.roehler@easy-emacs.de>
>>
>> currently, icon-title-format is a variable defined in ‘C source code’.
>>
>> As it's displayed at the top, it would be helpful, if it could display the version, for example.
>>
>> What about making it customizable?
> What do you mean?  Can't you customize it now?


Don't see how. Tried

(setq icon-title-format '(multiple-frames "%b" ("" invocation-name "@" 
emacs-version)))

with no effect.