How do I make objects translucent but keep background images solid? First of all, new to Blender (about 2 months now) so if this seems like a basic question, I apologize.  Here is my situation.. 

When modeling, I am using the Background Image for referencing front, back, and sides.  I am able to set the opacity/transparency of the images and model with the objects, but I am trying to do the reverse.

I am trying to figure how to set the opacity of all the objects in my viewport to be translucent, while leaving the Background Images with full solid opacity.  This way, I can easily see my drawing even through my objects.

When I do the translucent images, the lines begin to get hard for me to see.
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In Blender 2.8 and on, there is an option to enable translucency in a scene, called X-Ray. It can be found in the shading options in the viewport.



Once that is enabled, everything in the scene goes translucent. Images may also go translucent depending on how you imported them. If you import your reference by going Shift+A, >Image >Reference they will stay fully opaque.