While painting i often need to copy paint tiles of multiple layers at once which forces me to do the same operation multiple times instead of being able to select multiple layers.
e.g. i end like this:
select layer 1, copy from a to b
(go sure tiles are on the correct position)
select layer 2, copy from a to b
(go sure tiles are on the correct position)
select layer 3, copy from a to b
(go sure tiles are on the correct position)
Please add the ability to select multiple paint layers for copy paste operations.