One wallet, three coins

A Biscuit wallet isn’t one wallet per coin. It’s one wallet that holds Monero, Bitcoin and Litecoin, behind a single password. Send, Receive and History work for every coin: pick it at the top.

What’s inside a wallet

On your disk, that’s a few files with the wallet’s name, all encrypted with your password: see Wallet files and folders.

The tabs

Home
Prices, a currency converter, the Journal, Monero’s crowdfunding proposals. See The Home tab.
History, Send, Receive
For every coin: pick Monero, Bitcoin or Litecoin at the top.
Swap
Exchange swaps and atomic swaps, see Swaps.
Coins, Contacts, Notes
Hidden until you turn them on in the View menu. Coins is coin control, Contacts your address book, Notes a place for your own notes.

The status bar

On the left of the bottom bar, the sync status. On the right, your balances (click them for the details, see Balance), then a row of buttons:

When an update is out, a button for it appears there too.

Several wallets

File › Open wallet opens another wallet; File › Recently open lists the last ones. File › Close wallet goes back to the menu. Your Bitcoin and Litecoin wallets switch from the buttons above the address on Send and Receive; right-click one to rename it, show its seed or remove it.