reference images

How do you put an image with lines for reference on a plane and make it transparent to show only the lines in the on screen render? I saw a tutorial on how to do this but i cant find it anywhere. Thank you

It’s in the Tutorials Forum and IamInnocent has one here:

Basically, once you have added the Object that you are going to model goto F7 buttons, Draw tab and select Wire instead of Solid.