1)You can create hidden script for Section Access(Authentication, Authorization)
if you go to script editor>> file>> create hidden script, you can set password for hidden script, only addmin will be able to see or edit hidden script, other users cant.section access document is attached.
Indicators are the small dots that appear at the top of objects when a selection is made in there. You can also see them in the tab row if you make a selection on a sheet and then switch to another sheet. The idea is that they remind you of an existing selection that may not be apparent on your current view but it is likely impacting the data that you see.