I have a simple MXD that I have the page size properties set to 8ft x 4ft, the intended output being a large wall poster of an orthophoto. I have set my data frame to the 8ft x 4ft size, brought in the orthophoto mosaic layer, centered it on the area of interest, and that is all, no other layers. I then went to Export Map in the File menu and choose a destination and a name, and ArcMap then exports, but the resulting output is a blank white document.
If I change the page size to a standard large format (ie. ARCH E) and no other changes, it comes out fine with the orthophoto visible, but changing to the custom page size of 8ftx4ft I always get a blank page, though at the right size.
I have done a raster clip of the mosaic, with the clipping boundaries set as a shapefile of the 8ft x 4ft area of interest and it gave me a proper TIFF, however does someone know why I am getting a blank 8ft x 4ft page when trying to just export to PDF like a regular map?