FAQ: Why Can’t I Add Performers to a Movie?

By default, the performers subform opens in view mode. This mode is preferred for viewing records because the form paints faster when navigating between records. 

In view mode you can delete but not add performers. To add performers you need to toggle the subform into Edit mode. Use the button on the tool bar to toggle the mode. The subform will now display a drop down list for each performer and will have a last empty row for adding a new performer.

 Click the button on the tool bar to toggle the mode back to view mode.