Set Prefab position when added to scene (Edit mode)

I’m working with an artist who is doing level design for a side scrolling game. When we add a prefab by dragging it into the Scene view from the Project tab, is there a way I can set the Z position automatically?

We work in the Scene view in Ortho back mode, but when we add prefabs to the scene, the Z values are often wacky. I’d like to save a step and have it set it to 0 when first created/added.

You can do this by checking for EventType.DragUpdated. Check out this answer for a related solution: Editor drag&drop override - Questions & Answers - Unity Discussions