I normally use lightroom.. but I thought I would try bridge for selecting images before importing to Lightroom. But without a zoom (even to 100%) to check focus it is useless. In fact its no good at all for oraganising and selecting images as unlike lightroom it needs Ctl + number to rate an image and alt + delete to reject -- two keys when one only one is needed in lightroomn.
Hi, @Crazyhorse; besides using the Slideshow, one other option would be to change your default Bridge settings. Below is the Workspace that I use almost all the time. By moving the Content Panel to the full right and the Preview to the middle, I see the Preview in as large a space as possible. After all, what good is a preview if it's barely larger than the thumbnail? :>)
Also, keep in mind that if your images have a pixel height and width larger than the number of pixels in your monitor's height and width, your images will not be 100% in Bridge — period. Bridge will only show you a 100% view if the image's size is smaller than your screen's pixel size. If the image is larger than can fit on your screen, it will be scaled down to fit. If you want 100%, you'll have to depend upon Lightroom Classic or Lightroom Desktop.
Nonetheless, my Workspace does a pretty good job of showing you any potential lack of sharpness.