The status bar shows the balance of every coin, plus the total in your currency once prices have loaded. Click it for the details.
The balance window lists Monero and each Bitcoin and Litecoin wallet, with what each holds and what it’s worth:
Monero received can be spent after 10 confirmations, about 20 minutes. It’s a rule of the Monero network, not a Biscuit setting. Until then it counts as unconfirmed.
It also applies to your change: when you send Monero, the rest of the coins you spent comes back to you as change, and is locked for 10 blocks too. That’s why part of your balance shows as unconfirmed right after sending. Having your money in several outputs instead of one big one avoids it; sweeping can split an output.
Frozen coins don’t count in any balance until you thaw them, see Coin control.
Values in your currency need third-party data. With it disabled, balances show in coins only. A balance that looks wrong? See My balance looks wrong.