Edit A Dropdown List On A Form

1. Right Click on the Drop Down List in your Form Content. 
2. Select the Forms Control Editor. Note - The Name Field will be grayed because this is a database field and not editable. If you need to change the name field, delete this drop down and add a new drop down.
3. Make desired changes to your list. 
4. Click Done to add the edited list to your form. The forms content screen will display.
5. Click Save or Publish from the App Ribbon.