He means drag and drop. If you're on a PC, you can drag it and hover over AC on your taskbar until AC opens, then drop it into the floor plan. This will bring it in as a Figure.
I would be more inclined to bring it in as a drawing, as it gives basically the same resizing options, but can also keep a live link back to the original. This way you can replace the original with any updates and it will update in AC.
To use this method simply try placing a drawing with the drawing tool, and choose the image when prompted. Once placed you can scale it either using the drawing's settings or via the Resize command.
Cheers,
Link.