Interest rate swap rate reset frequency different from payment frequency

I'm trying to enter a USD interest rate swap fix-flt against 3 month libor. The payment frequency is every 6 months but the rate is reset every 3 months. On some swaps interest is compounded in the second period. I think I see the functionality under the "Int. Rate Adj." button on the floating leg when I change the Interest rate adjustment to regular but somehow FI10 do not play nice at all when I try to do the reset. I also cannot find where one would enter the compounding information,

could someone please point me in the appropriate direction?

Thanks