The round trip feature allows you to flag a trip as being a round trip. Additionally if you are calculating mileage reimbursements, you can choose to have the reimbursement amount automatically doubled.

By default these features are disabled, to enable them:

1. Access the preferences pane.
   
   Keyboard shortcut: Command key (it has a ⌘ symbol) and then the ","
   
   
   
2. Click the Trip Fields tab then check the Round Trip checkbox in the Visibility section to turn the feature on or off. If you want to double the reimbursement amount then use the Double Reimbursement checkbox to turn the feature on or off.
   
   
   

If you want the app to remember your last round trip choice then:

1. Access the preferences pane.
   
   Keyboard shortcut: Command key (it has a ⌘ symbol) and then the ","
   
   
   
2. Click the Trip Fields tab then check the Round Trip checkbox in the Remember Last section to turn the feature on or off