Is there a way to make a huge script more editable?

[wolfatadfilm]

Hi, this might be a stupid question, but for the first time I find myself editing a huge script, with 100s of blocks. Is there a way to put them into digestible units (like modules, classes, functions etc. in a programming language?
Is there a possibilty to number the blocks, create a list of which block links to which?
I find myself dragging arrows across the whole page, or hovering over little dots to see wherefrom a block might receive "traffic".
Thanks in advance for any tips you might have on how to simplify editing a massive script

 

[hunthunt]

use the "project in project" and old zp3 global variables as global variables

 

[wolfatadfilm]

Thank you, hunthunt. Could you please expand what you mean by "old zp3 global variables"? How would I do that in ZP7?