Load a session using any of the following options.
 File menu 
 Open Session...  
 open a previously saved session from file ( *.tvm ) 
Or click on the Open Session icon on the standard toolbar.
 
Or use the shortcut:
 + 
  Open session
If you have a limit of one session to be open at a time, any open session will be closed first, otherwise you can open multiple sessions at a time.
Save a session using any of the following options.
 File menu 
 Save Session...  
 saves all the session data to a file ( *.tvm ), prompting for a file name if necessary 
 File menu 
 Save As...  
 saves the session to a new file 
Or click on the Save Session icon on the standard toolbar.
 
Or use the shortcut:
 + 
  Save session
Unlike exports, there are no options here, as all the session data is saved.