Today’s Question: Can you toggle between the adjusted image and reset, back and forth, in Lightroom Classic?
Tim’s Quick Answer: Yes, in Lightroom Classic you can toggle back and forth between the full set of adjustments you’ve applied and the Lightroom Classic default settings via Reset, using the Undo and Redo commands. However, you might find the use of a virtual copy provides a more streamlined approach.
More Detail: If you want to view the original default interpretation of an image in Lightroom Classic without any adjustments applied, you can use the Reset command. Note that this is more reliable than using the Before and After views, because the “Before” version displays what the image looked like on import, which isn’t necessarily the same as the default adjustment settings. For example, adjustments may have been applied prior to import using Camera Raw, or you may have applied a Develop preset during import. Both of those would cause the “Before” view to differ from the Reset view.
So, if you want to truly see what the image looked like before any adjustments were applied, you could use the Reset button at the bottom of the right panel in the Develop module to reset all adjustments to their defaults. You could then use the Undo command (Edit > Undo) to undo the Reset, and as needed use the Redo command (Edit > Redo) to undo the Undo so that the adjustments are no longer reset.
However, as noted above, I think simply creating a new virtual copy for the image and using the Reset option on that virtual copy provides a more streamlined approach. That way you can simply switch between the original image (with adjustments) and the virtual copy (with adjustments reset) to compare a true before and after for the image.

