Comments Often, I find that the default “before” history state (which is automatically created when the file is imported), is not the state that I want to compare to the “after” or current state. Fortunately, to compare a different history state, you can simply drag and drop the desired state from the History panel into the “before” preview area. Note: don’t click on the state in the History panel – that will select that state as your current or “after” state: click -drag the state to the Before image.
• Tap the “Y” key to quickly cycle between the Before and After (current state) view.
• Shift + Y toggles the Split screen preview.
And don’t forget, if you reach a point where you like what you’ve done, but want to try a different direction, Command + ‘ (apostrophe) (Mac) | Control + B (Win) + ‘ (apostrophe) creates a virtual copy of your photograph so that you can explore all of your creative variations.