Photoshop Elements 15 For Dummies. Obermeier Barbara

account, as shown in Figure 1-6.

       FIGURE 1-5: Resize an image in the Image Size dialog box.

       FIGURE 1-6: An edited photo uploaded to Facebook.

      Creating Images from Scratch

      You may want to start from scratch by creating a new document in Elements. New, blank pages have a number of uses:

      ❯❯ Mix and merge images in a new document, as we explain in Chapter 8.

      ❯❯ Create a canvas where you can draw and paint, as we explain in Chapter 12.

      ❯❯ Use the New dialog box to find out a file’s size, dimensions, and resolution. You find out why these details are important in Chapter 2.

      Follow these steps to create a new document while working in any editing mode:

      1. In the Elements Photo Editor, choose File ⇒ New ⇒ Blank File or press Ctrl+N (⌘ +N on the Mac).

      Alternatively, you can choose Open ⇒ New Blank File in the Photo Editor.

The New dialog box opens, as shown in Figure 1-7.

      2. Select the attributes for the new file.

      When you select these attributes, among the things you need to consider is the output you want to use for the image: screen or paper. Files created for the web or for screen views are measured in pixels, and you don’t need to specify a resolution. For print, you want to use a measurement other than pixels and you need to specify resolution. We explain how all this works for the relevant settings in the following bulleted list.

      You have several options from which to choose:

      ● Name: Type a name for your file.

      ● Document Type: Select from a number of different document types such as paper, photo, web, and so on.

      ● Size: You can choose a preset size from a long drop-down list. This setting is optional because you can change the file attributes in the other text boxes and drop-down lists.

      ● Dimensions (Width/Height): Values in the Width and Height text boxes are independent; either box can be edited without affecting the other. Adjacent to the values in the Width and Height text boxes, you find drop-down lists that offer many options for units of measure, such as the default units of pixels followed by inches, centimeters (cm), millimeters (mm), points, picas, and columns.

      ● Resolution: Generally speaking, if your image will be printed, choose 300 dpi (dots per inch). If you plan to display your image only on a computer screen or mobile device, choose 72 ppi (pixels per inch). Chapter 2 explains the details about how resolution works.

      ● Color Mode: You most likely want to leave this at the default of RGB Color. Chapter 2 explains when you might want to use the other available color modes.

      ● Background Contents: You have three choices: White, Background Color, and Transparent. The selection you make results in the color of the blank image. If you choose Background Color, the current background color assigned on the Tools panel is applied to the background. See Chapter 12 for information on changing background color. If you choose Transparent, the blank image is the digital version of a sheet of acetate, and the image is created as a layer. Chapter 8 explains how you work with layers.

      ● Image Size: This value (displayed in the lower-right corner of the dialog box) dynamically changes when you change the Width, Height, and Resolution values. The Image Size value tells you how much file space is required to save the uncompressed file.

      3. Click OK after setting the file attributes to create the new document.

       FIGURE 1-7: When you create a new, blank file, the New dialog box opens.

       Sometimes you may want to copy a selection to the Clipboard and convert the Clipboard information to an image. Be sure you have copied some image data to the Clipboard. In Elements, choose File ⇒ New ⇒ Image from Clipboard. The data on the Clipboard appears in a new document window.

      After you create a new image, try playing with the different brushes and painting tools, just to experiment and get a feel for how they work. For example, click a brush on the Tools panel and then click and drag to paint in the image window. Or jump to Chapter 12, where we help you start using the drawing and painting tools.

      Retracing Your Steps

      In Elements, Undo is a favorite command for both beginners and experienced users alike. If you don’t like a change to your image, you simply choose Edit ⇒ Undo or press the keyboard shortcut Ctrl+Z (⌘ +Z on the Mac).

      Because trial and error (and thus undoing your work) is so important to making your image look just right, Elements also offers ways to undo that are much more sophisticated than simply reverting to the last view. In the following sections, we introduce you to these more sophisticated tools.

       Using the History panel

      On the History panel, you see a record of your changes in an editing session. And from this record, you can undo your changes from any step in an editing sequence. To work with the History panel, you must be in Expert mode. After you click Expert at the top of the Photo Editor, here’s how undoing with the History panel works:

      1. To open the panel, choose Window ⇒ History.

The History panel displays a record of each step you made in the current editing session, as shown in Figure 1-8.

      2. To undo one or more edits, click any item on the History panel.

      Elements reverts your image to that last edit. All edits that follow the selected item are grayed out.

      3. If you want to bring back the edits, click any grayed-out step on the panel.

      Elements reinstates your edits up to that level.

       FIGURE 1-8: The History panel.

       All your steps are listed on the History panel as long as you remain in Elements and don’t close the file. When the file is closed, all history information is lost.

       Storing all this editing history can affect Elements’ performance. If your computer slows to a snail’s pace when you’re using Elements, check out the following options:

      ❯❯ Choose Edit ⇒ Clear History. Elements flushes all the recorded history and frees up some precious memory, which often enables you to work faster. Just be sure you’re okay with losing all the history in the History panel thus far.

      ❯❯ Eliminate Clipboard data from memory. To do so, choose Edit ⇒ Clear Clipboard Contents or Edit ⇒ Clear ⇒