• Use Marquee tool OR lasso tool for selecting parts of an image.
• Use Magic Wand for irregular-sized objects.
• Use tolerance level in navigator to increase or decrease area selected by Magic Wand.
• Press Shift key and click on additional sections of an image to increase selected area when using Magic Wand
• To decrease it, press Option key and click

Superimposing images
...or "How to put someone's head on another's body so it looks real"

• Open both files ... make sure they're both scaled at 100%
• Select using marquee, lasso, or magic wand
• If either image is disproportionate ... scale it down using "image/image size"
• Combine both images using copy/paste; move/drag/drop
• Choose layer/transform/scale
• Shift/drag & grab handles to scale image proportionately
• Double-click cursor inside marquee

• Layers allow you to add, delete, edit or paint different elements of an image without affecting the other
• Go window/show layers or press F7 using a two-layered image
• To do any editing in one layer, click on it, then start using your tools
• To change the layer's order, grab the icons and move them around. You can also trash images using icons.
• To rename the layer, double click on the palette
• Try the opacity lever and the popup menus on the layers navigator
  to see what happens

1. Produce a superimposed image using the selection and layering techniques described above. Use at least two layers.
2. Write an analysis similar to the ones in the previous assignments.