Open a file containing one of the shirt images. I have here a pink shirt, which I will select with the Quick Selection tool. If this tool isn't visible in the Tools panel, click and hold the Magic Wand Tool to see the Quick Selection tool and choose it.
The Quick selection tool works like a brush to quickly select areas. I just click and drag on the shirt. If I miss an area, I simply continue painting to add to the existing selection. If I paint beyond the area, I can press and hold the Alt (Windows) or Option (Mac OS) key to paint what I want to delete. And, I can change the size of the tool by pressing repeatedly the right or left brackets.
