Setting Transparency
Changing the transparency of an object is a common need for designers. For the uninitiated, transparency in the design realm refers to how opaque an object is, or how much light is allowed to show through.
For a simple explanation, imagine a thick white sheet of paper. Undisturbed, you will not be able to see another piece of colored paper underneath. The white sheet is 100% opaque. However, if you add grease to the white sheet, you'll slowly begin to see the color underneath, albeit as a feathered, blurry image. The grease has taken away some of the opacity of the white sheet. As you add more grease to the top paper, it finally becomes completely see-through, or 0% opaque, and the paper below is completely revealed in the ...
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