When selecting an excluded field value, previous selections in conflict with the new choice are canceled. To prevent a previous selection from getting canceled this way, it is possible to lock all the selections in a list box by opening its Object menu and choosing the Lock command.
To unlock a previously set lock, open the list box Object menu, and select Unlock. General locks and unlocks of all the selections can be made from the Selections menu.
When trying to select a value which is incompatible with a locked selection in another field, the selection will fail.
By means of the Override Locked Field setting for list boxes, multi boxes and slider objects it is possible to override a locked selection in a field from a specific sheet object. The field will still be locked for logical changes stemming from selections in other fields. This option is on by default for slider objects.
