How do I add a new captured Morty to my party?

I've now combined a Morty that's the strongest among them all. But it's still in the daycare.
Any way that I can put another Morty there and take him out to join the party?
When I try adding them to bootcamp it has "out beside the rest of them so I don't know how to put them in and take the other one out

Hi, Behina.

In Daycare, go to Decks, select your active deck and tap Edit. Select the Morty you want to take out and tap Remove. Then below, select the Morty you want to join your party and tap Add. That's it!