BIM Views Manager Icons have a fixed "maximumSize" width. Width above 32 px Non Styleable.

[turn211]

As per discussion https://forum.freecadweb.org/viewtopic.php?f=34&t=56219 maybe when time is available some solutions. Thanks

[yorikvanhavre]

Sorry it took so long to look at this 😅 I am not sure how to specify a max width (in case no stylesheet is used), but I'll try removing the maxwidth property and see what happens

[yorikvanhavre]

Hmm if I do that I can't make a narrow dialog anymore... Maybe just removing the spacer would do?

[turn211]

Not being a programmer, I'll give my 2 cents
Maybe changing width to infinite (16777215) <width>16777215<width> instead of <width>32</width>
<widget class="QPushButton" name="buttonAddLevel"> <property name="maximumSize"> <size> <width>32</width> <height>16777215</height> </size>
if not maybe changing the spacers from having a Maximum size to Expanding.
https://programmerall.com/article/5185347729/
or maybe this helps
https://www.qtcentre.org/printthread.php?t=54080&pp=20&page=1