What is the little green light at the far right of Window 4 on the MC8 PRO?

First post, MC8 PRO new user. Enjoying getting to grips with it so far…

I can’t fathom what the little green light at the far right of Window 4 means? I’ve tried looking at the manual and done some searches but to no avail.

Sorry if it is a daft question but I would appreciate finding out :slight_smile:

wire_twerp

From the manual….although it can be tricky to find if you don’t know what to look for.

Thanks very much - I appreciate it!