Bug 433498

SUMMARY
This is the solution that worked for me on fixing krita not showing or allowing maximize for its window.

STEPS TO REPRODUCE
1. Install krita snap package from snap store.
2. Run krita after installation.
3. When krita is fully loaded, check to see if maximize button is present.
4. If maximize button is present click to maximize.
5. If maximize button is not present, double click on title bar to maximize.

OBSERVED RESULT
For screens with limited area for krita to display its full window content, if maximize button show after first load, it disappears immediately when you try clicking on it. If no maximize button is present, double clicking on title bar does not maximize window. Like I said, this happens only when screen area is not enough to display full content of krita's window.


SOLUTION
1. Open krita window.
2. Select view from the menu bar. 
3. Remove tick from show status bar. This will immediately show maximize button or allow you to maximize window by double clicking on title bar.
4. To trick krita into allowing window maximization with status option ticked, select settings from the menu bar and chose reset krita configurations. 
5. Select OK from the dialogue box that appears, then go back to view in the menu bar and place tick by show status bar.
6. Close krita window.
7. Open krita and you will still have button for maximize.

NB: If you have messed up original krita windows parameters by manual resizing and you want to have the fresh look of krita back, then head over to your home folder and show hidden files/folders, open snap folder and delete the krita folder (that contains user configuration for krita). Then follow the steps in the solution as listed above. The deleted krita folder would be restored on next launch, only this time, with factory settings.



SOFTWARE/OS VERSIONS
Pop OS 20.04 LTS

ADDITIONAL INFORMATION