Adding / Editing a Logo
You can add or change your site's logo from the Customize screen. From the dashboard choose Appearance > Customize.
Click on the play button above to see how to access the Customize screen.
You can insert your logo under the "Theme Options" section of the Customize screen. Choose Theme Options from the panel on the left side of the screen, then drag and drop your logo into the dashed box, or click the the "select a file" link.
Once you have added your logo, click the "Save and Publish" button at the top of the screen.