System divider

Is there a way to determine the exact size of a System Divider?

I need to have a System Divider appear in only one specific location. I was considering adding it as Music Text, but I’m not sure how to determine the correct size.

Is there perhaps a way to manually insert a System Divider at just one location, without applying it to other systems?

to change the size of a System Divider:

Yes, you can add it as staff text – right click and do Insert Music Text, then search for ‘divider’. As for the size, it can be whatever size looks good to you.