Auto Battle

By tapping the AUTO button on the Battle screen, you can switch to auto battle mode.
You can switch back to manual battle mode by tapping the AUTO button again.

Tapping AUTO will automatically carry out all selected commands.
You can enable or disable continuous auto battle from the options screen.

Setting can be changed under MENU > Battle Effects > Continuous Auto-Battle.
Also, by turning on Auto Limit Burst, units will automatically use their limit bursts once their limit burst gauge is filled.