On 2021-03-29 3:26 p.m., Michael Hamilton wrote:
Without a better description I'll have to guess what you're seeing. It could be a "Present Windows" edge effect. If the "small (preview) windows pop up when your mouse is near a screen edge, then that would confirm it.
Edge effects can be disabled via Launcer -> System Settings -> Workspace Behavior -> Screen edges. For any active edge, right mouse on the edge and set the action to "No action".
The default KDE is rich with features, but the UI can be customised to the nth degree. Your nonsense is another persons dream feature. If you'd prefer a no frills experience, perhaps start with openbox - it doesn't get much simpler than that - much like using an X Terminal from 1990.
No Action is already set for all edges, so that's not it. I'll try to describe the issue better. When I move near the top left corner, everything that's open collapses and I see a bunch of thumbnails scattered over the display. I haven't found a way to make it happen on demand.