Thanks,also i just realized i don't think there is a Select all function yet, it would be very helpful. Also i forgot to add another idea(it has no significant importance and not related to pixel art) but i think i shall tell it anyway
Tool (Bone System):
It is based on the assumption that multiple layers of a frame can be rotated by different angles and around different pivots.
Only theory but i think that a tool could be introduced that.
1. Opens up a window and views the current frame that is selected (layers included)
2. Then you can go on and place pivots for rotation, one pivot for each layer. (not on actual drawing, only inside the window)
3. Then we can rotate each layers based on their separate sliders and pivots given in the window.