Click on 'Mint' on the navigation bar
Select the synthetic asset that you want to add collateral, and click on 'Manage'.
Click on ‘Increase collateral’.
Type in the amount of PERL you would like to add as collateral and click on 'add collateral'.
Confirm the transaction.
After the collateral is added successfully, you can see that the number of collateral PERL has increased by 1000, and the collateralization ratio has increased as well.