Why aren’t some sheets being exported as PDFs even when I select “All Sheets”?

Sheets that are used as background for other sheets will not be exported to PDF.

If you find some of the sheets are not exported, please check if they are being used as background sheets.

If you want to have the background sheet included in the exported file, please add a blank sheet with the background, or copy it by opening your diagram and right-clicking on the background sheet tab, then choosing "Copy sheet" from the menu.