Instructions
Open Adobe Photoshop, then select "Open" from the "File" menu. This will display the file dialogue box.
Select your JPG file by clicking on it. At the bottom of the dialogue box, you will see two drop-down menus. From the drop-down menu marked "Format," select "Camera Raw."
Click "Open" to open your JPG image in the Camera Raw editor. You may see an error message regarding the size of your image file and be required to click "OK" to continue. This happens on smaller files that are not large enough to benefit from adjustment in the Camera Raw tool.