Actually it is a very detailed
'gray' are if you zoom in close on the hi-res city data. Sometimes you can make out the type of car in the photo
After you understand xapie128's post about controlling what mapfile and what position on the screen a mapfile opens at, here is some more stuff for you.
Note first that the toolbar's Toggle Imagery tool's status (on or off) will be retained when you close the program and open it again, only if you Save the mapfile when you close it. If you don't, it will be at whatever status it was when you opened the mapfile the previous time.
Here is something else you can do. On the Map Files tab, scroll down to the last 4 options, ADP,Color Aerial, Satellite, and USGS options. If you click the + sign it will open them and show all the maps that are in that type of data. If you uncheck this data, those maps will not show regardless of the toolbar's Toggle Imagery status, because you have said not do display that data by unchecking it. Your defeating the Toggle Imagery's function of a very quick access (and no access) to this type of data by doing this, but if that's what you want, do it. Later when you download some data you want, just remember that if you want to see it, it has to be checked in the Map Files tab.