You are always in your Funding Account, the main level. However, you can switch between Trading Accounts. There are two ways.
Method 1
On the sidebar menu, navigate to the Accounts section.
Select Switch and choose from the list of accounts that are available for you to switch to.
Method 2
From the sidebar menu, select My Account.
Go to Account Details.
Navigate to the Trading Accounts section and select Switch.
Choose from the list of accounts available for you to switch to.