Below are the options available in the General Settings:
Font Family: Here you can select any font from the given options.
Desktop Background: There are two options available: (1) Background image will allow you to add an image as the page background. (2) Background color will simply add a solid color to your page background.
Mobile Background: You can also customize the background of the mobile using this option. If you want to keep the background the same as the desktop background, then select Desktop background.
If you want to add a different background image in the mobile view, select the Background image option and upload the image you want. You can also set background color in the mobile background by selecting the background color option and changing the background color.
To know more in detail check it out from here.