SUMMARY After updating to plasma version 6.1.1, the icons in the taskbar look tiny. STEPS TO REPRODUCE 1. Have a 2560x1440 display 2. Resize "Icons-Only Task Manager" to height of 40 pixels 3. Update to plasma 6.1.1 OBSERVED RESULT The icons in the taskbar get significantly smaller You can find a screenshot from another user who had this issue here: https://www.reddit.com/r/kde/comments/1dtpkf8/after_updating_to_611_was_previously_on_some/ (for some reason, on my screen they are even smaller, almost half the size of the taskbar) EXPECTED RESULT Icons should have the same size as before, filling most of the space. SOFTWARE/OS VERSIONS Linux/KDE Plasma: Arch linux KDE Plasma Version: 6.1.1 KDE Frameworks Version: 6.3.0 Qt Version: 6.7.2 ADDITIONAL INFORMATION Resizing the taskbar to have a height of 48, makes the icons fill up all the space, but it would be much nicer if there was an option to get the previous look. (height of 48 looks kinda wrong on this monitor). I suspect there was a change to how scaling/margins are calculated, but couldn't find any relevant options.
I can confirm the behavior. If I set "Icons-Only Task Manager" to a height of 40 pixels the icons look the same as in the screenshot on the reddit post (smaller) Notably, they are smaller than the other icons in the taskbar - menu, peek at desktop, software center (Solus)
Created attachment 171576 [details] Difference between app menu icon and other icons
TracyC and I figured out that the cause is a spacer next to the task manager with "Set flexible size" checked (on by default). The spacer is probably taking up more space than it should or it's causing the task manager to give up more space than it should.
*** Bug 489301 has been marked as a duplicate of this bug. ***
I just re-tested on git master. I set it to fit content and back to fill width. I set it to the right and back on the bottom. No change. I noticed a detail I had missed before. At 40px, when I remove the spacer, the KRunner app menu icon gets smaller and is the same size as the task manager icons. When I re-add the spacer, the KRunner icon gets bigger, not the task manager icons.