When you want to play a LIVE game with a FRIEND that has already been set up then there is a difference between using a desktop/laptop and using a tablet or smartphone.
The following video shows how to set up a 90 minute time control from an Apple desktop machine.
If you are setting up from a smartphone, or I believe a tablet, then you are limited to 60 minutes, but you can add an increment - such as 30 seconds.
Notice, that the person issuing the challenge can select if they are playing as white, black, or let the computer decide. It is much more obvious on a tablet to select which player is white, black, or random.
At the moment, today, this is just a test.
You can also decide whether this is a rated game or not at the moment. As we are testing, decide with your opponent what to choose.