Photoshop can be a great tool for photographers. I use Adobe Photoshop CS6. When you are making edits to a photograph in photoshop you need to make the edits using layers. Having a layer per each edit will help if you need to back track and it can also keep the photograph in its original form if you aren't happy with the edits made. Most people edit a photo by going to image>mode>adjustments, this way your edits will be made with out layers and you could lose the original image potentially.
How to edit the photograph with layers: First open your image in the Adobe Photoshop software. Then go to the control panel on the left and at the very bottom of the panel you should see a strip of icons (starting with a 'link' icon and ending with the 'trash' icon). To make an adjustment layer click the circle that is half white (the forth icon from the left). The you will see a tab slide out. Here are your adjustment options. Choose an option, make the edit, then exit the tab. You will see a layer has been made with this edit. To go back and edit the same layer, tap two fingers on your mouse pad and a tab will slid out, at the top it will say 'edit adjustment' and will open up the edit tab again. To see the edit you made on the image click the eye on the edit adjustment layer, and re-click it to see the difference. You can continue this process with each adjustment. For every adjustment a new layer will be made. Comment below if you have an questions, here is a link for more information.
https://www.youtube.com/watch?v=osz9ERuygtI
How to edit the photograph with layers: First open your image in the Adobe Photoshop software. Then go to the control panel on the left and at the very bottom of the panel you should see a strip of icons (starting with a 'link' icon and ending with the 'trash' icon). To make an adjustment layer click the circle that is half white (the forth icon from the left). The you will see a tab slide out. Here are your adjustment options. Choose an option, make the edit, then exit the tab. You will see a layer has been made with this edit. To go back and edit the same layer, tap two fingers on your mouse pad and a tab will slid out, at the top it will say 'edit adjustment' and will open up the edit tab again. To see the edit you made on the image click the eye on the edit adjustment layer, and re-click it to see the difference. You can continue this process with each adjustment. For every adjustment a new layer will be made. Comment below if you have an questions, here is a link for more information.
https://www.youtube.com/watch?v=osz9ERuygtI