If it becomes necessary to change or retire a batter due to injury or because the wrong batter has been selected, this can be done by touching the three dots next to their name:

In the above example, we are going to retire (not out) S Abbas. When you press the three dots you will be presented with a choice of actions:

Choose ‘Change batter’ and you will be presented with a list of batters:

Choose the new Batter and press Done.

You will now be asked to confirm the reason for the change:

In this example, we are choosing ‘RETIRING (NOT OUT)

The batter has now been replaced on the Scoresheet:

The Scorecard also reflects this change: