Penalty shots can be added during your round or in the editing process post-round.
To add a penalty shot in-round:
From the yardage screen, press the mode button once to navigate to the Penalties screen. Once on this screen, press the top right button to add a one-shot penalty or the bottom right button to add a two-shot penalty.
To add a penalty shot post-round:
While in editing, select the shot where the penalty occurred, click “Penalty” and finally click the “Add” button.