What do you mean, the paperless voting machine?
Touch screen. When you sign in, you are handed a voting card for you to insert into the machine, which tells the machine that you are a bona fide voter.
You touch the screen to choose a candidate from each category, e.g., POTUS, VPOTUS, etc., which highlights that name and all others you choose on that page. Then you move to the next page(s) as the case may be. When you have gone through the entire slate, the machine brings back up all the selections you made and asks you to confirm or edit them.
When satisfied with your choices, you press the VOTE button, which locks in your choices in Memory in the computer, and/or in the system. Then the Voter Card pops out of the machine and you hand it back at the table where you signed in, and another voter uses it, etc., etc.
No paper, no ballot to stuff in a box. This is York County, PA.
P.S. If you desire to vote a STRAIGHT TICKET, as I have done with the Big “R” Lever several times in my 56 years of going to the polls, the machine allows you to do that, without going through all the candidates and offices. You just touch the big icon with REPUBLICAN on it, review the choice, confirm it, and press VOTE icon on the screen.