So the other night when i was working on one of my commissions i stumbled across this. Now, i've seen it a few times before, just, didn't know what it was for. so i decided to doodle this up in case others may not know about it, not sure if it's common knowledge or not.

but basically it works like this, the Pin pins that layer to the layer your on they move together. So it basically ‘links’ the ‘pinned’ layer with the one selected.

will put into scraps later, but been wanting to throw this together after finding it. hope it helps some of you ;w;!!