Q: Could you please tell me the difference between MERGE LAYERS and MERGE VISIBLE? Another thing, how can i "unmerge" merged layers? Thanks everyone! God bless.
A: Merge layers - you merge all layers together. Merge visible - you merge all visible layers together (all that you deselect wont be merge). You can't unmerge, you can use "undo" and go back to where you make mistake.