To find a player, type a part of the name of the player and the squad builder will suggest some players matching the charaters you entered.
To add the card to the squad builder, select one of the suggested player with either your mouse or keyboard.
The player will be moved to an open spot which will match the best with his preferred position.
You can change a player's position by selecting a position from the dropdown menu on the playercard, which shows up when you hover your mouse over the player card.
This feature can be useful when you do not want to spend coins on position changing cards.
Change the squad formation by selecting a formation from the dropdown menu just left to the "Save" button.
Drag the card to the position where you want him to be placed by holding down the left mouse button. Cards will be swapped if the new position is already occupied.
Press the "Clear" button to remove all player cards from your squad.
This action cannot be undone.