When you are modifying an image, you are basically trying to make minor changes to improve it. For example, you might change the colour balance or brightness, remove minor blemishes, change eye colour, and more.
You are not changing the composition of the photo or adding or removing major elements. You are just trying to make the photo look better.
Spend time working on these hands-on tutorials to learn the image modification skills you will need.
They can all be found by clicking Help... Hands on tutorials... Then change All Categories to Photo Editing
Follow some of the tutorials from these categories:
Adjust photo lighting
Enhance colour in photos
Resize images
Retouch photos
Modify an image of yourself to improve it.
Work with a friend to take a range of photos of each other, both inside and out.
Upload these onto your computer - place them in your Digitech folder in a new folder called Image manipulation
Now use the key techniques you have learned in Photoshop to try and improve them.
Try and include a modification from each of the categories: