You got through your draft. That's awesome! Now you have the best team of players and you need to be able to utilize them as best as you possibly can. Some weeks players will be on byes or perhaps play against a really tough opponent that might stop one of your players from scoring the most points. You need to be in control of who is in and who is out. You need to decide who will be scoring points for you.
For that reason, we have the concept of a "bench". These are extra players on your team who don't earn you points for the week. The players who do earn you points are known as the "starters". The bench is there to provide you flexibility in cases like the ones stated above. Most leagues have benches, but they can be removed in the scoring options, so check to see if your league has a bench.
Modifying Your Roster
After your league's draft is complete, your chosen players will fill your roster from your first pick down to your last pick. You can swap a player, or make any modifications for the player, only if the player hasn't started his first game for the week.
To be able to swap players from your starting lineup to your bench and from your bench to the starting line up, press on the "swap" icon (the button with the two arrows facing in opposite directions) to the left of the players. After you press "swap", all of the available players for that position will pop up. Then you can choose to the other player you want to move by pressing on the "swap" for that player. We're using an Overwatch DPS here as an example.
What if the player I want to move doesn't have a "swap" icon next to him? This means that that player is locked for your matchup because he's already played a match.
Now you know how to swap players around on your roster.
Swapping players is one way to bolster your roster, but there are others: