Not show ZERO (0) in a Number Parameter

[ToanDN]

Sorry wrong forum. Please ignore.

Let's say I have a Room schedule column showing the Occupant Load Factor (OLF) for all the Rooms. There are certain Rooms designated as Accessory Use need not to have an OLF so they are blank in the schedule. However, if I change a Room from another Use that already had an OLF value entered, Revit does not allow me to just erase the previous value and I have to enter 0 instead. That does not affect the calculation but it looks odd in the schedule since some rows are blank and some filled with 0.

Is there any way to overcome this? Can I use some IF 0 THEN No Show formula here?

Thanks.