When this option is enabled, the left header area is initially closed, and you only have a menu icon visible. Upon clicking this icon the entire left header becomes visible: displaying a logo, menu items, and widgets – including the logo set for the initially closed left menu area, which is displayed on the bottom of the left menu while closed. You can upload that logo in Qode Options -> Logo -> Logo Image - Side Menu Area Bottom. To define another menu icon, navigate to Qode Options -> Header -> Left Menu Area -> Button Color and Button Margin Top.