If you have a photo with several people and you want to create separate portraits, while keeping the selections the same size, the Selection Tool is a quick way to do that. You just create your first selection, copy and paste into a new image, then using the mover tool and right clicking, move the selection to the next person. Then repeat the process for all the people in your photograph. You can use precise shape selections to create complex shapes. By adding and subtracting from a series of selections you can create most any shape you can imagine.
Lets take a look at an example.
In the above example I first created a vertical oval selection. Then, while depressing the Shift Key, I added a horizontal selection. Next I rotated the selection 45 degrees and repeated the oval selections. To get the cutout effect, I subtracted from the selection. To do this, I depressed the Ctrl Key and repeated the oval selections leaving space between the first oval selections.