I'm doing a construction bid and I'm using Visio 2003. What I've done
is to capture a roof plan from a PDF file by using snag it. I cut and
pasted the image into Visio. Now I'd like to add some shapes to it.
However I can seem to do any annotations on the captured image. I
tried making it a layer, but I can't seem to merge it so I can add
stencils to the image.

Any suggestions would be appreciated.