This document will show you how to derive a new account from an existing account on SubWallet.
Step 1: Open SubWallet homepage and click on the account name to get to the account management screen.
Step 2: In the account management screen, click "Create new account". Then choose "Derive from another account".
Step 3: Choose from a list of your existing accounts.
Your new account will be automatically created and added to the account list.
You might want to change the account name. Please follow this guide.
You could also derive a new account from the details section of a particular account. In this case, you would not have to go through Step 3 in the above instruction.
From Step 2, if you choose the configuration button (the pencil icon next to a particular account), you will be directed to the Account details section. You could then choose the Derive an account option in this section.