I have a problem with the selection tool. When I use it, I do not see the boundary line. Also, if I set the square shape, I can do only a limited, preset shape and not a free one.
I'm sorry that I have problems with Krita so often. But I do not know anyone else who could help me.

the default shortcut to display/mask the selection is "ctrl+h"

Of course, I have this activated, but to no avail. Seems to be a bug in the program, because even with another Pc and 4.1.7 this occurs.

Also, if I set the square shape, I can do only a limited, preset shape and not a free one.

You proly locked the ratio or the width and height in the tool options for the selection tool.

For the other thing, I think it might be either graphics acceleration related, or we need a screenshot to see if it has to do with colors.

Here is a video of the problem : https://www.file-upload.net/download-13 ... l.mp4.html