Softproofing "Before:" settings
When in LrC Develop module, Soft Proofing, there is a setting on the Toolbar for "before:". The first three choices are "Before State", "Current State", and "Original Photo". These are to set the view shown in the "Before" panel. I see no difference between "Before State" and "Original Photo", and "Current State" seems to identical to "Proof Preview". I have searched Adobe LrC documentation and find nothing about this, and very little about soft proofing in general. Where can I find documentation about this?
