It’s probably one of the first things you may want to do when you start customizing the theme to align its looks to your brand.
Main Site Logo
To upload your logo, navigate to Appearance > Customize > Header > Logo, or click the Edit button (blue pencil icon) in the Customizer’s preview.
The Alternative Logo is a secondary logo file that will be displayed in the Sticky Header as well as the Mobile Header.
The size for both the Site Logo as well as the Alternative Logo can be adjusted via Appearance > Customize > Header > Logo.