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7.6. Fields

The concept of temporary placeholders is one of mankind's greatest inventions. When you change a tire, the jack acts as a stand-in for the tire, supporting the car until the new tire is in place. When technicians set up the lighting for a particular Hollywood movie scene, a low-paid extra models patiently, so the highly paid star doesn't have to while the technicians fiddle with shadows. When a magazine designer doesn't yet have the photo that will go on page 3, he'll simply place a box there in the correct size and label it FPO (for position only), with the intention of replacing it with the finished photograph when it's ready.

In Word, fields are temporary placeholders that stand in for information that may change or may come from another location on your hard drive—the current date, a page number, a place you've bookmarked, the name of a Word file, and so on. Fields, in fact, are the basis of some of Word's most powerful features. They let you:


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