Is there something I'm missing? How can I challenge a call?
I’ve only done it once and it was just a graphic that popped up after the play asking me if I wanted to go challenge the call or not. I haven’t seen any way to initiate challenging a call on your own.
If you are talking about DD its not an option.
In franchise if it's a play that can be challenged then a window with the option to challenge will pop up.