Good morning

Thank you for your reply again!
For (1), I try to change the cell size but I don't know why it doesn't change.
In picture one, it is the original one.
In the second picture, I made the change but the cell size remains half the whole size

For (2) and (3), I have some questions.
(a) My procedures: insert the script > select type A atom in 'Select type' > click 'histogram' > chose 'Type 2 coordination' > click 'Use only selected elemetns'
Am I correct?

(b) Do I need to edit the script? If yes, what thing should I change?
(c) In the script, why the cut-off be 3? Can I change to other value?
(d) It seems that the coordination number I get is very big. (picture 3) Perhaps it is due to the problems of cell size or the cut-off is too large?
(e) In the 'histogram', if I choose 'coordination' and click 'use only selected elements'
For example, my sample contain atom types A, B, C.
I only click atom A in 'Select type'.
So it show the coordination of number of A (number of B and C that surround A)?
Again, thank you very much!

Sorry for my silly questions again and again, since it is my first times to do the work on the analysis of simulation of atomic configuration, I don't know a lot of thing in this field
And I have few experience on computer coding too:'(
Thank for your great help! I really learn more about how to use OVITO