Units of measure

The Width and Height pop-up menus contain the five common units of measure mentioned earlier: pixels, inches, centimeters, points, and picas. But the Width pop-up menu offers one more, called Columns. If you want to create an image that fits exactly within a certain number of columns when it's imported into a desktop publishing program, select this option. You can specify the width of a column and the gutter between columns by pressing Ctrl+K and Ctrl+5 to display the Units & Rulers preferences. Then enter values into the Column Size option boxes.

The Gutter value affects multiple-column images. Suppose you accept the default setting of a 15-pica column width and a 1-pica gutter. If you specify a one-column image in the New dialog box, Photoshop makes it 15 picas wide. If you ask for a two-column image, Photoshop adds the width of the gutter to the width of the two columns and creates an image 31 picas wide.

The Height pop-up menu in the New dialog box lacks a Column option because vertical columns have nothing to do with an image's height.

Tip You can set the default unit of measurement for the Width and Height pop up menus in the Units & Rulers panel of the Preferences dialog box. (Select the value from the jF Rulers pop up menu; the Type menu sets the measurement unit for text related controls.) But if the dialog box isn't already open, here are two quicker options:

Ij-1 ♦ Press Ctrl+R to display the rulers and then right click anywhere in the rulers to display a pop up menu of units. Click the unit you want to use.

♦ Display the same pop-up menu by pressing F8 to display the Info palette and then clicking or dragging on the cross icon (next to the X and Y coordinate values) in the palette's lower-left corner. Again, just click the unit you prefer.

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