It is likely that Krita has the incorrect screen resolution from your computer. That problem happens mostly when an external monitor is present and when either a monitor or a tablet was connected after the system boot.You can fix this issue manually by:
- Put your stylus away from the tablet.
- Start Krita without using a stylus, that is using a mouse or a keyboard.
- Press Shift key and hold it.
- Touch a tablet with your stylus so Krita would recognize it.
- You will see a special dialog asking for the real screen resolution. Choose the correct value or enter it manually and press OK.
If you have a dual monitor setup and only the top half of the screen is reachable, you might have to enter the total width of both screens plus the double height of your monitor in this field.
If this didn’t work, and if you have a Wacom tablet, an offset in the canvas can be caused by a faulty Wacom preference file which is not removed or replaced by reinstalling the drivers. To fix it, use the “Wacom Tablet Preference File Utility” to clear all the preferences. This should allow Krita to detect the correct settings automatically.
Warning – This will reset your tablets configuration, thus you will need to recalibrate/reconfigure it.
For Krita 3.3 or later: You can try to enable “Windows 8+ Pointer Input”, but some features might not work with it.