Appreciate answers. I got a little lost with Sarkuts' help. I must be a dummie.
"How does the order affect the final outcome when I have to merge them altogether?
If you mean flattening the image when you have finished, then what you see is what
you get, before and after flattening.
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If you have several layers with different blend modes in a stack, say 1,2,3 and 4
with 1 being the lowest and 4 the highest, then it's best to merge 2 down into 1 first.
Next 3 down into 1 and, finally, 4 down into 1."
Sorry-- I have no clue what this means other than maybe "blend/merge" layers at different times according to the layer position. Sounds like I should start at the bottom and once the 2 bottoms ones are done then merge the upper ones 1 at time according to where they are in order? Then the final step is flatten?
Why am I starting at the bottom? I believe what people say but don't get it.
I've been searching the web to learn more about layers but nothing seems to explain the importance of positions etc.. so I thank people for help.