The Waivers and DFA screen is where you can manage waivers and players who are designated for assignment for the selected team:

The Waivers and DFA screen behaves very similarly to the Overview page, except that by default the four transaction boxes are the active and secondary rosters on top, and the waivers and designated for assignment boxes on the bottom. As with the Overview page, to make a transaction, drag a player from one pane to another, or right-click on a player and select a transaction from the right-click menu.

Note: This sub-screen is not available if you do not have minor leagues or if waivers are disabled in the Rules screen of the Game Setup.

See Roster Rules and Management for more information on transactions involving waivers and DFA.