The Deck Browser
The deck browser is the first screen most people see when they open Anki. It displays a list of your recently open decks, how many cards are due or new, and provides a button to open the deck or perform other operations on them.
Each open button has a different shortcut key for quick use - hover the mouse over to find out.
Hiding from the list
More>Hide from list
When you hide a deck from the list, it remains on your computer but won't appear on the list anymore. If you want it back on the list, use File>Open.
Deleting
If you choose delete the deck will be deleted. This is permanent, so please be careful.
Refresh
Updates the due & new counts for all the decks, hides decks that are no longer accessible, and shows decks that weren't previously accessible but are now.