There are three ways to add liquidity.
Entry 1: Pools page - click on the specific pool - Pool page "+"
Entry 2: If you are already on the Swap page, find "Add Liquidity" in the Assets pool section
Entry 3: If you have previously provided liquidity, you can find the pool on the Me page. Click on the pool and you will see "+'
After adding liquidity, you will receive the corresponding lp tken in the dialog window.
Two type of crypto currencies must be added at the same time to provide liquidity successfully and obtain LP tokens. If you only add one then exit the page, or you don't get an LP token after the addition, don't worry, the currency you paid will be refunded in ten minutes.
There is no handling fee for add liquidity.