You can use the boxes to seperate players by level, position, etc. Then select the number of players to be drawn from each box.
Paste or type the name of your players separating them by boxes.
You could separate as this: Box 1: Goalkeepers, Box 2: Defenders, Box 3: Midfields, Box 4: Forwards
Or you could do something like: Box 1: Best players, Box 2: Average players, Box 3: Weak or inexperienced players
Select the number of teams you want to draw using those players.
Select how many players from each box you want to draw for each team. For instance, for a 7-a-side game: Box 1: Goalkeepers, Box 2: Defenders, Box 3: Midfields, Box 4: Forwards, you want 1 Goalkeepr, 2 Defenders, 2 Midfields, 2 Forwards. So pick that accordingly from the boxes
Click on Draw Teams. Have fun!!