Q: is it possible to use m4 functions like substr() in FvwmIconMan Format formatstring?

[maoamid]

What is the syntax to follow?
In documenation is only mentioned this:

*FvwmIconMan: [id] Format formatstring
A printf like format string which describes the string to be printed in the manager window for each managed window. Possible flags are: %t, %i, %c, and %r for the window's title, icon, class, or resource name, respectively. The default is "%c: %i". Warning: m4 reserves the word format, so if you use m4, take appropriate action.

I'm trying to limit the button label to a fixed number of chars only. Any clarification will help.

[ThomasAdam]

Hi @maoamid

No. This isn't possible. FvwmM4 is no more in fvwm3. The real bug here is that the manpage needs updating.

[maoamid]

@ThomasAdam thank you for clarification