The church logo field is used for your header logo. The image for your logo will be resized to a max width of 176 pixels and a max height of 70 pixels.

The footer logo field is used for your footer logo. The image for your logo will be resized to a max width of 288 pixels and there is no max height. If this field is left empty your church logo will also be used for the footer logo.

Your site default is to center the logo and split your navigation up to the left and right of the logo. By selecting the logo left field the header logo will align to the left and your site navigation will no longer be split and display to the right of the logo.