5.6-3 May I just select an image from Google for a PowerPoint presentation and insert it into my presentation without any further ado?

FAQ

If the image is a copyright-protected work (and that is generally the case), then it may only be used with the consent of the author and the owner of rights. However, the image can be entered into the presentation as a ‘pictorial quotation’. Then it has to serve an explanatory, informational or illustrative function, be covered in the scope of the purpose of the quotebe disclosed as a quote and the source specified (Art. 25 para. 2 CopA).