Very close: text, colours, shapes, pictures, tables and backgrounds come across. Fonts are replaced with a standard one, and charts, SmartArt, video and animations aren't included. For a pixel-perfect copy, use File > Export > PDF in PowerPoint.
No, hidden slides are left out.
Not yet. Export the PDF, then print it with several pages per sheet.
No. It is converted in your browser, on your device, and never sent anywhere.
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