How do you make a blank background?

Question

Occasionally users what to hide the aerial background so they can read annotation. I tried making a white box as a vector layer that covers the basemap.  I also tried exporting a white screen to an image and loading it in the viewer.  Neither method works.  Any ideas?

brettangel · Answer

We published a white polygon, cached it and use it as a basemap to achieve what you are asking for.