The FIRST STEP is to add a Mapping condition to use on this Column

Click in the Image on any "existing condition" or on "Add - Edit - Delete" buttons to open that Step by Step tutor

Click in the Image on "Next - Back" or "Save" or "Cancel" to Navigate

You can use ONE or SEVERAL conditions

You can define conditions at Column or Record levels

You can combine Condition(s) with another Option

The NEXT (combinable with conditions) or LAST STEP is to click on the "Next - Back" button or on the "Save" one

(you can also select the relevant TABS to select your Options)