3D Model Layer Problem?

i know this is a dumb question, but i'm very new to csp so... yeah. i can't figure out what i've done wrong here, but for some reason it will no longer allow me to select any preexisting 3d object on this layer and use the little blue camera / rotation buttons like i could before. if i add a new object on the same layer (or any other layer), however, they DO show up and work just fine.

how do i make them come back so i can rotate the camera back to the proper angle on this layer? i really don't want to spend hours and hours trying to remake the same poses when i've already finished one third of the drawing over them...

i'm using the program on ipad only as i have no good pc. i attached some screencaps if that helps.