Okay, so I clicked the little arrow pointing right (Playback button) & it said "This function is not selectable in current shooting mode" --I was on Auto Mode.
So I tried P Mode & Manual Mode & then the Play button took me to choose either AF Mode. Huh?
So either there is some other PLAY button unmarked on my T3 or else mine does not work?
Nope, that doesn't work nor what I needed. I want to turn off the histogram blocking half of my screen so I can't even frame the photo. Anyone?
Your camera sounds like it needs to be repaired. But, judging from the age of it, Canon may no longer support repairs on that model. Besides, a repair will likely cost more than buying a used Rebel, like a T5.