Hide a Key signature from a staff

• Apr 11, 2018 - 09:27

I'm boned right now. I want to composed sth new. But I don't know how to do. And I don't know what it's called but it's something like... Each staff is different key signature? (First attachment)
I've tried to hide only one of them. But. Nope, doesn't work

Attachment Size
idunnowhatitscalled.jpg 6.12 KB
doenstwork.png 24.77 KB

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