2. Choose the Brush Tool and a Soft Round Brush suitable to the size of your photo.
Click to enlarge
3. Press the "Q" Key on your keyboard to enter the Quick Mask Mode. Use your "brush" to mark all the hair. Start with the
outline.
Click to enlarge
4. Press the "Q" Key on your keyboard again to leave the Quick Mask Mode. Now we have everything around the hair
selected (everything between the dotted line around the hair and the dotted lines around the outlines of the entire photo).