Using rulers and changing units of measurement

You can display horizontal and vertical rulers to help you better position elements. To display or hide rulers, click View on the menu bar, then click Rulers. (A check mark to the left of the Rulers command indicates that the Rulers are displayed.) In addition to displaying or hiding rulers, you can also choose from various units of measurement. Your choices include pixels, inches, centimeters, millimeters, points, picas, and percentages. Pixels, for example, display more tick marks and can make it easier to make tiny adjustments. You can change the units of measurement by clicking Edit [Win] or Photoshop [Mac] on the menu bar, pointing to Preferences, then clicking Units & Rulers. In the Preferences dialog box, click the Rulers list arrow, click the units you want to use, then click OK. The easiest way to change units of measurement, however, is shown in Figure 3. Once the rulers are displayed, right-click (Win) or [Ctrl]-click (Mac) either the vertical or horizontal ruler, then click the unit of measurement you want. The Info palette, located in the upper-right corner of the workspace, also displays your current coordinates. Regardless of the units of measurement in use, the X/Y coordinates are displayed in the Info palette.

FIGURE 3

Changing units of measurement

Right-click (Win) or [Ctrl]-click (Mac) to display measurement choices

FIGURE 3

Changing units of measurement

Right-click (Win) or [Ctrl]-click (Mac) to display measurement choices

FIGURE 5

Background layer deleted

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Warning box

FIGURE 4

Warning box

FIGURE 6

New Background layer added to Layers palette

Background layer no longer present

FIGURE 6

New Background layer added to Layers palette

Background layer no longer present

History state indicating layer conversion

History state indicating layer conversion

New Background layer

Convert an image layer into a Background layer

1. Open PS 2-1.psd from the drive and folder where your Data Files are stored, then save it as New England Fall.

TIP If you receive a warning box about maximum compatibility, or a message stating that some of the text layers need to be updated before they can be used for vector-based output, click Ok or click Update.

2. Click View on the menu bar, click Rulers if your rulers are not visible, then make sure that your rulers are displayed in pixels.

TIP If you are unsure which units of measurement are used, right-click (Win) or [Ctrl]-click (Mac) one of the rulers, then verify that Pixels is selected, or click Pixels (if necessary).

3. On the Layers palette, scroll down, click the Background layer, then click the Delete layer button ^ .

4. Click Yes in the dialog box, as shown in Figure 4, then compare your Layers palette to Figure 5.

5. Click Layer on the menu bar, point to New, then click Background From Layer.

The Autumn Maple Leaves layer has been converted into the Background layer. Did you notice that in addition to the image layer being converted to the Background layer that a state now appears on the History palette that says Convert to Background? See Figure 6.

6. Save your work.

You displayed the rulers, deleted the Background layer of an image, then converted an image layer into the Background layer. You can convert any layer into the Background layer, as long as you first delete the existing Background layer.

What You'll Do

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In this lesson, you'll create a new layer using the New command on the Layer menu, delete a layer, and create a new layer using buttons on the Layers palette.

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