Step 1: To update the account limit for a specific asset, select the account from the accounts view

Step 2: Select Actions on the Asset card for the asset which you want to update the limit for, and then select Set Limit

Step 3: Set the limit for the asset

This will bring up the limit management screen showing the current limit, which you can change to your preferred limit. 

Please note that you will not be able to set a limit that is lower than the current balance of the asset in the account.