Created attachment 182445 [details] Presentation with additional layer with display="none" Open attached document. Look at it in edit mode and in print preview. Now play the presentation. The slideshow shows objects which should not be displayed. From point of file format Impress can use layers same as Draw and it works for edit view and printing. But the slideshow ignores the "display" property of the layer. [The purpose of the macros in the document is to be able to change the layer to which an object is assigned.]
Confirm with Version: 7.5.0.0.alpha0+ / LibreOffice Community Build ID: 90861cc6f815b3f34edb88d47afed0d1099e72e7 CPU threads: 4; OS: Linux 5.15; UI render: default; VCL: gtk3 Locale: cs-CZ (cs_CZ.UTF-8); UI: en-US Calc: threaded