There isn't a placeholder for QR code images, but you still have a couple of options to get one on your presentations:
1) You can merge it with a property image to get it on the flyer.
2) You can use it in place of either the Realtor headshot or logo
To retrieve a QR code to use, generate your presentation link in Advice Engine, then go to a QR code generator site and plug in the link to get a QR code that references the link. If you don't have a resource for this, there are several free options online like: