UX Component - Detail View - New Records - Default Values
A new option has been added to the List builder to allow you to automatically use the default value that was defined for the control to which the List field is bound for new record default values. For example, assume:
You have a list with a field called FNAME
You have a control in the List's Detail View called FIRSTNAME and the FNAME List field is mapped to this control
The FIRSTNAME control has its Default value property set to 'Fred'.
UseControlValue - (default choice)The default value will be 'Fred'
None - The control will not have a default value (even though the control specified 'Fred' as its default value)