Q: I need to create the equivalent of a Q&A template in a number or Text field that will limit the number of entries in the field.

A.
This code will do the trick. Put it in the relevant layout element, in the "On Element IMMEDIATE change" event. That way it is checked with each key press. Change the layout element name from "Zip" to whatever your layout element is called.  This example sets a limit of 5 characters. Change every instance of 5 to whatever you want.

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IF @Len(Zip) > 5 THEN
{
  Zip = @Left(Zip, 5)
  @MsgBox("", "TOO MANY CHARACTERS!" ,"Max 5")
}