When you are creating a new league after having used League Manager for at least one previous league, you can create a new league using settings and players from a previous league. Once you create the league, you can add new players, delete or change golfer status to substitute for those players not returning, move player around to different teams, etc.
Please view our video on how to create a new Filled league. You can also refer to the User Guide page, Create | Edit | Delete League.