Managing ad slots is possible through the AX-Ads plugin, settings can be found in the WP Admin panel › Settings › AX-Ads panel.
AX-Ads provides default ad locations to insert ad codes. Additionally the theme registers ad slots on the archive pages, in the photo gallery, on post pages, header, footer and as a slide-up element.
All settings for ad slots can be found in the Ad Slots section in the WP Admin panel › Settings › AX-Ads panel.
Gallery Sidebar Ad example: