> Did you enable the Pen output in the spacedesk Viewer settings -> Remote Control?
> On which drawing app? Paint? Photoshop?
I specifically tried Photoshop and Krita. It works fine on the machine I’m connecting from, though.
> Is the issue only in pen eraser? how about the other drawing tools e.g. pencil, brushes, etc?
I think you might’ve not understood the problem. My pen has two tips – one for drawing, one for erasing. It seems like Spacedesk simply doesn’t distinguish them.