Once in PancakeSwap, if you haven't connected your wallet to PancakeSwap yet, you will need to do that.)
If you already have HZN and BNB in your wallet, you can now deposit them to add liquidity by clicking "Add Liquidity". The box will expand and show you more options.
After depositing your HZN and BNB, you will now have HZN-BNB LP Tokens. These LP tokens will increase in value as it shares the dividends of the trade fees when trading between HZN and BNB.
Add Liquidity Page.
Add Liquidity Page Expanded upon clicking "Add Liquidity" button.
Step 3. Deposit LP Token in the Earn Tab
The last and final step for depositing the LP tokens into the Earn tab to earn HZN.
Depositing into the Earn tab.
In Genesis's Earn tab (https://genesis.horizonprotocol.com/earn), assuming that the contract has already been approved, there should be a
"+" and "-" icons. Click the "+" icon and input how many HZN-BNB LP tokens you want to deposit. The amount of LP tokens available should be visible on the bottom right-hand side of the input box.
NOTE: there will be a 7-day lock, which means you will not be able to take the LP tokens out within 7 days.
Once you confirm the transaction in your wallet, you have completed all the steps to adding liquidity to the HZN-BNB pool!
Extra: Remove LP Tokens
Removing consists of performing the steps 2 and 3 in reverse order.
In Genesis's Earn tab (https://genesis.horizonprotocol.com/earn), remove the LP tokens from the Earn tab by pressing the "-" button, filling in the input with the number of tokens to remove, then clicking "UNSTAKE".