How many cells are considered as surface?

[MIraola]

Dear developer,

thank you for writing and maintaining this useful code.

Let me ask you a very precise question: when simulate the surface ARPES spectrum, how does the code decide how many cells form the surface termination of the slab? That is, are the atoms of the last 1, 2, 3, ... cells of the slab considered to be part of the surface? I have not found anything like "number of atoms on the surface" in the output file.

Thank you for your help.