There’re different logo locations in MediDove. All of them can be configured in
Appearance → Customise → Medidove Customizer → Header Settings
To make your logos look crisp on Retina devices, simply upload a Retina logo to the corresponding upload fields.
Retina versions are twice as large as the original ones. For example, if your logo is
100px x 50px, the
Retina version must be
200px x 100px.
Overlay logos are used when the homepage post slider or page header is set to Large. It’s basically inverted version of a logo, that will look good on an image background. Page edit > scroll down > Enable Secondary Logo > Header Style 2