SUMMARY Normally, there is an outline box in Inkscape to tell if the dialog attached to the mouse can be docked. It does not appear in the Breeze-gtk themes however. It should look as shown: https://media.inkscape.org/media/resources/file/2021-11-21_19-09-22.gif STEPS TO REPRODUCE 1. Open Inkscape 2. Open some dialogs (e.g. XML Editor and Fill and Stroke w/ Ctrl + Shift + x and Ctrl + Shift + f) 3. Click and drag a tab to the side of a dialog OBSERVED RESULT There is no docking outline EXPECTED RESULT There should be a visible outline to tell if the dialog can be docked/snapped. SOFTWARE/OS VERSIONS KDE Plasma Version: 5.23.3 KDE Frameworks Version: 5.87.0 Qt Version: 5.15.2