To create multiple lineups, the first step is to click the Lineups tab at the top of the page. This will take you to the page that I created a screen shot that appears above.
Next, click the Upload Lineups Button. That's the second button from the left on the right hand side at the top. This will take you to the following screen:
So you copy the Name + ID or just the ID to the position that you want to play that player in row 2. So for example, if I wanted to play Drew Brees at QB, Kareem Hunt and Todd Gurley at the two RB spots and Michael Thomas at WR in my first lineup, I would copy his name and ID to the QB field as shown below:
Once you have completed this process, simply save your file as a CSV file. It should look something like this:
If you have already created lineups and joined contests and you want to mass edit your lineups at one time, the process is basically the same. You will click on Lineups, but this time, you are going to click on EDIT ENTRIES, which is the third button from the left. That will take you to this page:
By the way, if you use a good lineup optimizer, the optimizer should have an option to export the lineups that you created into a CSV file. Then you can simply upload that CSV file to DraftKings as explained above.
I hope you find this helpful for managing your lineups. If this is extremely helpful to you and you would like to provide a tip, please feel free to leave me a tip by clicking this link here.