The image assigned in your Admin area under the Site Logo field is used for the navigation logo.

Note: If you previously uploaded a logo file in your media you can type the file name to locate it, or you click 'upload a new image' to add it to your site and your media.

The current theme logo is displaying at 126 pixels wide by 51 pixels high.  If you uploaded a logo image that is larger than the recommended image size, your logo will be resized to a max width of 176 pixels wide.

We recommend using a PNG file for the logo. A PNG file supports transparency in the image, specifically transparent backgrounds. Transparency allows you to see the logo image while also seeing the background of the website page behind it.

JPG, BMP, or GIF files may also be used, but these file formats do not allow for transparent backgrounds. You'll see the full background shape of your logo image without transparency.

Your site default is to center the site logo and split your navigation up to the left and right of the logo.

You can choose to align your site logo left of your navigation items. When this is selected all navigation items are displayed to the right of the site logo.

Logo Help Article