One of the nice things about Lightroom is that it lets you view before and after versions of your image. Lightroom can do this so easily because it does not make permanent changes to your image as you work on it. Instead, Lightroom keeps a log of the edits that you have made and only applies them to the image when you export the image.
Use the Before/After options in Lightroom to check that the changes you have made to your image to make sure that you’re headed in the right direction.
Here are some ways to harness the comparative Before/After power of Lightroom:
Step 1
If you are in the Develop module you’ll need to make sure that View Modes are enabled so that you can see the necessary icons. To do this, click the small triangle under the image to the right in the Develop module and choose View Modes.
Step 2
You will now see a button which has Y|Y on it. Click this to see the before and after views of your image.
Step 3
From the dropdown list you can choose from multiple ways to see the before and after views. Before/After Left/Right shows the before and afte