Is there a way to change opacity and extract each layer individually?

Hi, i’m new to Aseprite, used to work on paint tool Sai and was wondering if there was a way to change opacity and extract each layer individually.
I used to draw all the poses of a character in each layer in Sai and save the document as psd to export each layer individually in photoshop.

i dont understand the extract part, but to change layer opacity, double click the layer.

Other than the opacity, i want to work on multiple layers with the character’s poses and extract them after one by one. I that possible?

i still do not understand what you mean by extract.