PHOTOSHOP 2-6 Working with Layers Chapter 2 Converting (Jetty web server)
PHOTOSHOP 2-6 Working with Layers Chapter 2 Converting Layers When you open an image created with a digital camera, you ll notice that the entire image appears in the Background layer. The Background layer of any image is the initial layer and is always located at the bottom of the stack. You cannot change its position in the stack, nor can you change its opacity or lighten or darken its colors. You can, however, convert a Background layer into an image layer (nontype layer), and you can convert an image layer into a Background layer. You need to modify the image layer before converting it to a Background layer. You might want to convert a Background layer into an image layer so that you can use the full range of editing tools on the layer content. You might want to convert an image layer into a Background layer after you have made all your changes and want it to be the bottom layer in the stack. QUICKTIP Before converting an image layer to a Background layer, you must first delete the existing Background layer. You can delete a Background layer by clicking it on the Layers palette, then dragging it to the Delete layer button on the Layers palette. 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 upperright 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
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