Adjust Z position and scale at the same time

I seem to remember a short cut or modifier key to scale an object while adjusting it's z position.

I am importing a .psd so everything is flat. I want to ad some z space for a camera move, but I need the final look to be the same as the flat .psd. When increasing the z position the object gets larger so I need to scale it down. I would like to adjust the z position and have the size stay relative to the rest of the frame.

I can easily adjust the z position and then scale it up or down, but I do this a lot and it would really help to do it in one step.

Thanks,
Glenn

Thank you Robin. I tried every key combination in the inspector window and on screen controls, but I did try the HUD.