Hello. I'm using a plugin in my Wordpress blog that uses Lightbox. Photos will open in an iframe window instead of a new tab or new browser window. It can also be used for other content, not just for photos. I started using it for links to other pages. Instead of letting the window open in a new window - or even worse in the same window and risking to lose readers, I thought it's better to let the page open in an iframe that's only about 70% of size and in the background you still see my blog post. However, I'm afraid that it could have negative effects on SEO. Does anybody know more about this?