Show Conditional if value 'X' field is selected

[billuran]

Hello, I have a button i want to show if value X is selected regardless if Y is selected as well. So show button if at least X is selected. here is actual formula which works if only 1 value is selected.

[BM STAFF]='Ancillary'

I am sure its an easy solution.

Bill

[billuran]

Can you help me then to show another button if value is not selected IE my field does not equal X?