handy tip for door fit-up

Remember how careful you were in cutting out your doors, only the width of the jig saw blade? you've trimmed off some of the hinge side, if using an inset hinge, hung the door and it hits in several places, but hard to tell where...I did this on my first one but thought others might like this tip....get a sheet of carbon paper...fold it in 1/2 and run it along the edge of the door while opening and shutting it...all the black marks are where it hits...of course this doesn't apply for a lot of applications, but does on a Woody with a framed door...Doug