On top of selecting a time control, a lobby host can select rules for the control scheme. Here's what's available:
Move Type: Free or Snap
In Snap mode, your pieces snap to the center of the tiles. You're also forced to play legal moves.
In Free mode (which is my preferred way to play), you are free to set the pieces down anywhere on the board. You still do need to play legal moves to end your turn, but you're responsible for finding them.
Capture Mode: Automatic or Manual
In automatic mode, an opponent's piece is automatically moved off the board when you move your piece on its square. This is similar to how it works in most online chess games.
In manual mode, placing your piece on an opponent's square knocks it over. The player has to move the piece off the board to end their turn.
End Turn: Press Clock or After Legal Move
If there's one thing I love about playing over the board, it's hitting the clock paddle. I'm not a professional chess player, I'm not even a good chess player, but I know how to hit a clock paddle. In press clock mode, a player has to press the clock to confirm the end of their turn.
In After Legal Move mode, the turn is automatically ended when a legal move is played, similarly to how it works with most online chess games. This is probably what you want to select if you plan on playing bullet mode, but hey, I won't judge if you like chaos.