I'm trying to redraw my property's survey drawing in order to plan a fence.  The scale on the drawing is 1":15'.  This makes is annoying to convert, especially since the drawing doesn't show dimensions in certain locations.  I'd rather just measure the drawing (something I realize shouldn't be done but I have no choice really) and then put in the measurement off of my 10 based ruler.  Instead I have to convert .5" into 7.5' and so forth, you get the idea.  Is there a way to set this in the options?  I would imagine it would be since this is very similar to AutoCAD but it's been a few years and I can't recall.

Thanks!