You would like an individual cell to perform an action, or play a sound, when tapped.

Resolution

To set an action / sound for a cell:

1. If the top toolbar is hidden, tap the black line above the Message Area, and then tap the top-right Edit View icon.
2. In the left pane, tap the relevant topic.
3. In the right pane, tap the relevant cell.
4. Tap Action / Sound and choose your desired option.