Rookie's question

[BRQ]

I'm football fan from Poland, playing fantasy football for the first time. I drafted my players today and I have question concernig starting line'up.

Do I choose my starters once per week or I can change my line'up for example after Sunday, before MNF? I think that I can prepare only one line'up for entire week, but not sure. Thanks for help.

[Popcynical]

I usually set my rosters up on Saturday night (for the guys that play on Sunday) and then again on Sunday if I have any guys playing on Monday night.

You must set your roster BEFORE the games start because once a game starts the players you have in that game are locked in your roster.

[BRQ]

Thank you very much for help