When you have more than one website under your login, you are able to switch between websites, either by the dropdown in the top toolbar, or an option on the WELCOME screen / dashboard.
The webspace ID area shows your current Webspace ID and Name.
Clicking the dropdown on the right hand side will show you the number of websites under the account, you can then choose a second website from the list.
On the welcome screen, on the right hand side there is a section for your websites available under the current account.