Here is the video I mentioned that I found in the chat for this week’s livestream, about setting up blueprints to use in 2.8. 2.8 has gotten rid of the old “background images” function, presumably because it was very memory-intensive and incompatible with the 3D viewer upgrade they did.
This video explains how to set up background image objects in 2.8, for now. They may add a more convenient or better system as 2.8 is developed.