I’ve seen all manner of ways for people to “hide” things when working on their InDesign files so they can grab what’s underneath, or just edit something with no distraction.

Some people Copy/Paste the object (not realizing that you lose the layering you may have done), some people Lock/Unlock (not very effective if you ask me), still others will place things on a separate layer and turn that layer off (that’s a lot of work), and some people simply move objects off to the side (requiring them to be moved back into their precise previous position).

The easier solution is to have your object(s) selected and just hit Command+3 to hide them. Command+Option+3 will bring the hidden object(s) back into view.