in PL8 on Mac comparetool in retouch mode is usless ,
in old version compare in retouch mode was showing before and after retouch changes now is showing all changes without geometry, which is even more annoying when working on cropped image.
cant this be reverted to that functionality just to show before and after retouch?
Yes, the compare mode has been changed … and is now much more useful in PL8.
In addition to comparing without/with geometric corrections (the Reference image in PL7), the Master, the Virtual Copy/ies, and the output file/s, you can now select any image as a reference for comparison.
To see your retouching results (before/after), try creating a virtual copy, which also works with the Loupe tool.
Just wait a moment for the Loupe tool preview to load. Then you can instantly switch between the versions. Both previews are cached.
have fun 
You didn’t understand my post.
I’m not talking about the compare tool in general, but about comparing when you’re in retouch mode. Try crop image, enter retouch mode and then press compare button. on Mac - Useless!!!.
In Local Adjustments mode compare has default option “All corections except Local Adjustmens”
It would be great having something similar in Retouch mode “All corrections except ReTouch” (as was in previous versions) and when you going to ReTouch not change zoom.
And have shortcut for show/hide mask.
no problem in PL 8.5.0 windows version 
Here’s a video of compare, working just by pressing the D key, whilst in retouch mode…
