How can I show "Only direct flights" parameter selected by default in the Flight Search page?

To have "Only direct flights" selected by default on your TTS WeBook Booking Engine you need to activate this parameter in the "Settings" page of your backoffice. 

To activate the parameter select the checkbox "Show "Only direct flights" selected by default" located at the beginning of the page and store changes by clicking "Save" on the beginning or end of the General section. 

 
The "Only direct flights" item will then be presented as selected by default in the flight search page.