Where the pink line is (path drawn with a pen tool) is where I want the light blue object to be split up. I am using the eraser tool to do this but using the shift key to cut straight only allows for 45 and 90 degree cuts.
I've read advice where people say to "Use the Pen Tool to make a line and Stroke with the Eraser." That sounds like what I need to do here but I don't understand exactly how to do that--if anyone has a link to a video or can explain it step by step to me I would so appreciate it!
Or if you have a better suggestion for what I'm trying to achieve that works too.