CHECKBOX basicsh

Silly question perhaps but I’ve got a CHAR(1) field that defaults to value ‘F’. However, when I check the box the value becomes ‘1’ and unchecking the box results in value ‘0’. I want the checked value to be ‘T’ and the unchecked value to be ‘F’. How to get this done eludes me. :)

Need to assign a value list to the checkbox field with values ‘F’ and whatever else.

If no value list is assigned, 0 and 1 are the defaults.