After you have added your social media accounts, it is easy to switch between them.
If you are on a mobile device or tablet, open the right sidebar by clicking on the icon on the right side of the navbar at the top of the screen.
On the right sidebar, click the title bar of the social network of the account you want to switch to (i.e. Twitter).
Click on the social media account you want to switch to under that social network.
The left sidebar menu will then change to pages/features available for that social media account.