cbParallax

Please visit the plugin help tab for further information.

Most likely, this is because your theme doesn't support the WordPress custom-background theme feature. This plugin requires that your theme utilize this theme feature to work properly. Unfortunately, there's just no reliable way for the plugin to overwrite the background if the theme doesn't support this feature. You'll need to check with your theme author to see if they'll add support or switch to a different theme.

That's unlikely. Just to make sure, check with your theme author and make sure that they support the WordPress custom-background theme feature. Also, make sure that no container element is covering the element that holds the background image.

Your theme must support the [Custom Backgrounds] (https://codex.wordpress.org/Custom_Backgrounds) feature for this plugin to work. If you're a theme author, consider adding support for this feature if you can make it fit in with your design. The following is the basic code, but check out the above link. add_theme_support( 'custom-background' );

• This is not really a limitation of functionality, but since the background image container wraps the body element, it usually resembles the viewport dimensions. This means, that on themes where the navigation bar is on the side, the sidebar covers a part of the viewport and thus also a part of the image (logic, but noteworthy).

Yes. I have a look at the plugin's support page two or three times a month and I provide some basic support there.

• Besides the known limitations, no.