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qet.addPdfPage() renders one page of a PDF file to an image and places it, through the same QPdfDocument::render() call, white- background compositing (a transparent page would otherwise show whatever is under it, unlike every other placed image) and DiagramImageItem/AddGraphicsObjectCommand underneath as the "add PDF" toolbar action's own file/page-selection dialogs. Only reachable in a build with the QtPdf module (Qt >= 6.4) -- some Qt6 distributions omit it entirely (see diagrameventaddpdf.h). The method is still always declared and compiled, guarded internally instead of with the class itself: a script asking whether qet.addPdfPage exists must never get "not a function" for a reason it has no way to discover. Refuses with a clear reason when the module is missing, the page number is out of range, the file cannot be loaded, or the resulting render is degenerate. Verified against a real 2-page PDF (this session installed qt6-pdf-dev, which was missing here) that the two rendered pages differ in content and that dpi scales the rendered pixel size linearly, not just that the call returns something. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>