You can use TV fictures to move matches, which should amount to the same thing. So for instance, if you want 5 out of 10 games per round on Saturday and 5 on Sunday, you can pick Saturday as the default matchday, but move 5 games to Sunday. Or the other way round. You can also pick individual kick-off times for each match.
If you want the matches to be evenly distributed among the teams, choose "shared arounf". If you don't want the matches to be televised, choose "don't televise"(!).