SF allows you to select both a camera and guide chip in SF when displaying a FOV indicator. The result is the FOV of both the camera and the guide chip are overlaid. The same thing does not work in SN8 Beta. If a guide chip is selected it overrides the camera, and if a camera is selected it overrides the guide chip. The result is you cannot have the nested camera and guide chip FOVs unless you create a separate FOV indicator and turn them both on.
Also, there is a FOV cross-hair option in SF, but there doesn't appear to be in SN8 Beta unless I missed it somewhere.