Varying Beam Spacing LEAP Steel

I have beams with varying spacing. When I try to make multiple beam groups within the same span, an error message says that beam groups are overlapping. Ok, so it obvious you cannot have more than one "beam group" within the same span. If I have 10 beams in a single span, how do you input that beams 1-3 have a certain spacing and beams 4-10 have a different spacing?