Note: When you enter an amount in the input, the equal amount of the token pair will auto-generate based on current LP ratio. You can use the max buttons to determine the most you can provide, although it may not allow you if you don't have enough of the other token. If this happens, click the max button on the other token (the smallest in total fiat value), and that's the maximum you can provide to the pool.
This is added to your overall LP token amount and available upon removal. Same as UniSwap!