The Side Panel is hidden by default and can be triggered using the Header Button displayed near the Main Menu.
The Side Panel settings can be found in Theme Options > Header > Side Panel. The full list of options can be seen with the Header – Side Panel article.
Using other buttons to trigger the Side Panel
Since version 1.4, you can trigger the Side Panel using any button. For example, open the Button element settings modal and check with the Button action option.
This functionality is available with the following elements: Button, Call to action, Photo box, Pricing table, Process steps, Sliding box and Sticky navbar.