If Toolbox and dockers are set to not hidden in Canvas-only mode, dockers layout (positions and their show/hide states) are remembered separately in Canvas-only mode for the current session. Upon exiting Canvas-only mode, every docker layout change will be reverted to what they were in Normal mode. This is an unwanted behavior. It leads to confusion to those who use Canvas-only mode with some dockers shown. How to reproduce: 1. Configure Krita > Canvas-only settings > uncheck "Toolbox and dockers" 2. Press Tab to enter Canvas-only mode 3. Close a docker, or move its position 4. Press Tab again to exit Canvas-only mode 5. Dockers are reverted to what they were in Normal mode. Workaround: 1. Only change dockers in normal mode 2. After changing the dockers, restart Krita 3. The changed dockers layout now works in Canvas-only mode Tested with krita-5.3.0-prealpha-a8f6ca21b0-x86_64.appimage
I'm not sure this is actually fixable, because it's tied in with how Qt remembers dockers: through saving the entire window state. Canvas-only mode is a separate window state from normal mode, so it saves the dockers separately.