Answer:
by myself
Explanation:
i guess it depends on what the project is, but i prefer to do it alone
A vertical line to left of multiple staves indicate to a musician to play music on all staves at the same time.
Leonardo Da Vinci kind of discovered art
The "pocket" your talking about is called the gusset, which is in the crouch area. It's main purpose is for hygiene and absorbency.
