Eric, You might try a more CAD like program for what you want to do, such as DoubleCAD. I haven't used that one personally, but I hear it is good (and free). For what you are suggesting I would import the pdf into my CAD program, but it isn't cheap and it's on the Mac. Try also: eDrawings by SolidWorks. It all depends on what formats the program you use will accept. You may need to translate to another image format to bring the image in and scale it up, to be able to draw over it and measure. Note that bitmap images do not have discrete elements to measure. You need to trace or use your measuring tool over the image--without aid of snapping points or references. Always see if your associates can provide dwg or dxf files, which are vector files that SU and other programs can open, and DO have discrete elements that can be directly measured and manipulated in many programs. Another way to say what TIG and Hono have, I guess. Peter