Bridge displaying old screenshots too small

Bridge CC2018

iMac 27" with retina display

I use the screen shot tool in the Mac OS and have been for as long as I can remember, it's part of my work flow and research process. I just got a new iMac with the retina display (not because I wanted too, I had too) and my old screen shots are too small to use and/or read.

I understand the retina display native resolution and the PPI of the screen/display and how it correlates to the PPI in the image. Which is what's causing the problem (in PS and AI too...but that's another topic).

What I need to know is how to make Bridge show those older screenshot images in the preview pane large enough for me to see and use them. Or, is there a way to set the zoom level of the preview pane?