My first big surprise with Blender and just when i thought this one would be easy i was in for a lot of confusion around the topic so i will make thing clear with this gif where by simply pressing alt+x in 3ds max i get to see my picture bellow the box with wireframe and solid in edit mode;
I found many old solution that don’t seem to be relevant anymore and the confusion around some of these posts was quite something!
I know that with image background with switching to front i can see it but the goal was to use it with the great images to plane addons since you got more flexibility.
I also tried transparency with material but on my system changing alpha does absolutely nothing and even in cycle it does not get transparent either but i saw a post mentioning that it was not working in edit mode.
Please tell me there is simple and quick way to do that in Blender even if it mean waiting for 2.8?