DigiPaint 7.2.1

So I have finally decided what to do with the animation frames going from one set to another. What you do is you middle mouse button one frame in one set and one frame on another set, then you hold CTRL and release it on the other frame's set and then the frame should put itself on the first block on the set. Then you can middle mouse button on it and move it anywhere on that set by pressing middle mouse button again.

This is something unique to DigiPaint. Other apps use a slider with very small images to no images at all.