Crystal Reports if-then-else selection based on parameter

Question

I have this crystal report, and I want to be able to use it to display every person in the table or display only those who owe money.

The parameter is called displayAll and is a boolean. Basically I want this

if displayAll Then
   Show every person
else
   Show only When Balance is below 0

How can I do this?

Answer 1

In your Record Selection Formula, say something like:

If {?DisplayAll} Then
    True
Else
    {Data.Balance} < 0;