SUMMARY The pixel filter has four inner corners (1/4 circles) to grab and move the filter. It would be awesome to have grab handles like the new ones of Spectacle in 5.17 and to be able to move the whole rectangle by grabbing the whole area. The current implementation is very cumbersome.
I found that there's a white cross in the center of the rectangle, which can be used to drag the rectangle around. However, it's hard to see on a white background (really!). However, it would be convenient to be able to drag the area by clicking anywhere withing the region. If two layers overlap, there needs to be an easy way to fetch the desired one.
Created attachment 123725 [details] Video of the issue.
I am not able to find the "pixel filter", do you mean "auto mask"? If so can you try the latest appimage? The interface has improved but you still find an issue please reopen.