The Layering Effects menu (in Local Page Settings) contains modifications that change how a page visually interacts with pages below it, and can be used on pages that are pinned, overlaid, or have a Backdrop or background color.
Page Blend Mode
Allows blending of the page against pages beneath it, using mix-blend modes such as multiply, screen, overlay, difference, etc. The page must be Pinned or set as Overlay.
Content Blend Mode
Allows blending of a page’s contents (the area that the page width is set to) against the page’s own Backdrop or background color.
Content Background Blur
Allows blurring everything that appears beneath the page’s contents (the area that the page width is set to). This is available for pages that are pinned, overlaid or use a Backdrop.
Page Background Blur
Allows blurring everything that appears beneath a page, available for pages that are pinned or overlaid.