To deposit BTC go to "Assets" - "BTC". - "Deposit", generate a deposit address (if it hasn't been generated before).
At registration, for each account of the exchange, a unique wallet number is generated.
To deposit, just copy your wallet number and make a BTC transaction.
Niceties of BTC deposit:
The minimum deposit amount is 0.001 BTC. The amount less will not be credited!;
There are no restrictions on the types of BTC wallets;
You can track it in any block browser, for example in this one;
The minimum amount of confirmations:
for deposits of less than 0.25 btc - 1;
for deposit of more than 0.25 btc - 3.