Drag lag and weird screen boarder build-up

[defaultjhg716qfjzrf]

Hi, I wonder if someone might help. I have just bought Photoshop 2021 and there is terrible lag when I move my drawing and zoom in and out.

On top of this there is a strange deposit of pixels around the edge of the screen. Yesterday it was across the top today along the bottom.

What is this weirdness?

Many thanks

[AxelMatt]

In a first step i would try to reset the Photoshop preferences to the default settings.

https://helpx.adobe.com/photoshop/using/preferences.html#reset_preferences

If this doesn't help it can be a problem with your graphic card driver.

Here you'll find more informations about and several steps to check:

https://helpx.adobe.com/photoshop/kb/troubleshoot-gpu-graphics-card.html#DisableGraphicsProcessor

[defaultjhg716qfjzrf]

Thank you so much, this reset to default settings has worked!