Go to the top right avatar and click to see a list of your current aliases and their balances.
You can store multiple aliases or accounts in the same wallet.
You can switch between aliases by clicking on the alias of choice and the wallet view (Home) will update automatically.
You can also switch between aliases when viewing messages or marketplace activity for each account.
You will see an entry in the list called "All Accounts", this shows the total balance of all your aliases plus the balance held in your default wallet address. When "All Accounts" is selected, you will see a wallet view of all the alias combined.
To edit an alias, go to the "Aliases" tab and select "My Aliases" and click on the alias you wish to edit.