On a FanDuel slate every FD Upload button writes FanDuel's columns (QB, RB, RB, WR, WR, WR, TE, FLEX, DEF) using the player ids from the API — nothing to load.

Pick up to 12 anchor players and how many lineups to build around each. Generate Lineups simulates legal lineups around each anchor (players drawn by predicted ownership, kept only if they pass the tier screen, stack the QB with a WR/TE, have no offense facing your DST and use at least 97% of the cap), ranks them by projection, drops the bottom of the list (Draw from) and takes one at random from each equal section — so the portfolio spreads across the range instead of piling onto the top projection. A WR/TE anchor whose QB missed the tier screen gets him back as an option. Cash instead builds each anchor’s best lineups with an exact optimizer. Games, TD odds, team caps, max games and bring-back in Games & Correlation above all apply.

Pick the players you want in — up to 3 QB · 6 RB · 8 WR · 3 TE · 3 DST. You can leave spots open: every slot your picks don't fill is filled at random from the eligible players, under the cap, and each lineup is stacked with a pass-catcher from its QB's team. Build makes that many lineups.