SUMMARY The "Application-Specific Settings" or "Window-Specific Settings" menu does not show the "Add Property..." and "Detect Window Properties" buttons until the window is resized STEPS TO REPRODUCE 1. Open dolphin 2. Navigate to More Actions > Configure Special Window Settings 3. Look for the Add Property button 4. Resize the window.. Poof! SOFTWARE/OS VERSIONS Windows: macOS: Linux/KDE Plasma: Fedora KDE (available in About System) KDE Plasma Version: 5.22.90 KDE Frameworks Version: 5.86.0 Qt Version: 5.15.2 ADDITIONAL INFORMATION
To make it clearer: you need to resize the kwin_rules_dialog menu window itself to make the buttons appear
Can reproduce on Neon Unstable. Operating System: KDE neon Unstable Edition KDE Plasma Version: 5.23.80 KDE Frameworks Version: 5.86.0 Qt Version: 5.15.3 Kernel Version: 5.11.0-27-generic (64-bit) Graphics Platform: X11 Processors: 2 × AMD A6-6400K APU with Radeon(tm) HD Graphics Memory: 7.7 GiB of RAM Graphics Processor: AMD CEDAR
*** This bug has been marked as a duplicate of bug 442660 ***