For the pen tool, you have to click and hold to bend it, if you drop it first it won't work
I just went to try that, nope it still makes straight lines only, and does not bend at all, I tryed all sorts of differnt thing to make it bent but nope, it makes straight lines or no lines oh one more question, I dont undertsnad HOW to shade, in my program it either coveres with an entiry new colour and you will never see the other colour again, or the other stuff wont touch the other layers.