The Presentation viewer creates all pages of a document as a big stack of elements using absolute positioning. It controls the page elements' visibility via the visibility style directive. However, unlike other browsers, Safari 14 on MacOS Big Sur seems to frequently layout/paint every page of the document, even if the page has visibility: hidden set. Adding opacity: 0 seems to resolve the problem.
The Presentation viewer creates all pages of a document as a big stack of elements using absolute positioning. It controls the page elements' visibility via the
visibilitystyle directive. However, unlike other browsers, Safari 14 on MacOS Big Sur seems to frequently layout/paint every page of the document, even if the page hasvisibility: hiddenset. Addingopacity: 0seems to resolve the problem.