@Wally0114
Assuming you are using a form to create a new record, in the default property of the control inside the card for your number: Coalesce(Parent.Default, yournumber) .
The Coalesce() function reads the elements from left to right until a nonBlank one is found. In a new form, the Parent.Default will be blank and yournumber will be inserted. If the form is in edit mode, there will be a Parent.Default and it will be the one in the control.
A common use is to assign the next ID number in a series so in that case,
Coalesce(Parent.Default, First(Sort(table, ID, Descending)).ID+1) will assign the next ID number regardless of the number of records in a list.
