Yes exists some settings to activate sidebar on page:
1. look in Admin Dashboar > myThem.es > Layout
here you have latest setting: “Single page layout” just select sidebar position to left or right and select sidebar to display on pages ( after this go to Appearances > Widget and fill selected sidebar ) also if you want some custom sidebars go to myThem.es > Sidebars and create your custom sidebars.
2. You can activate sidebar only for specific page go to Admin Dashboard > Pages and select page to edit, here you have a box named : “myThemes Settings”
check the check box “Use custom layout”
after select sidebar position and sidebar to display only for this page.