First ensure your Sollet is connected (with devnet selected).
Click to the SWAP tab
Select a Source currency
Select a destination currency
Enter an amount to swap
Confirm the transaction in your Sollet window.
Currently, a fund is restricted to trading in a total of 5 assets. Once 5 different assets have ever entered the fund, these will be the only assets you can trade between. This limit will be expanded on in future releases.