Exporting Images in Various Graphics Formats

To save all the graphic images in the current PDF document, choose Advanced➪Export All Images. The Export All Images As dialog box appears, enabling you to save the images in one of four different file formats that you select from the Save As Type drop-down list:

• JPEG (Joint Photographic Experts Group): Choose this file format for true color compressed images.
• PNG (Portable Network Graphics): Choose this file format for compressed bitmap images.
• TIFF (Tagged Image File Format): Choose this file format for compressed bitmap images using both text and graphics. (TIFF is usually the format used to store the paper pages you scan.)
• JPEG2000 (Joint Photographic Experts Group): Choose this file format, a newer version of JPEG that utilizes state of the art wavelet compression, for even truer color compressed images.

After you select a graphics file format from the Save As Type drop-down list, select the drive and folder where you want the images saved. As soon as you click the Save button, the program goes through the current document and saves all the images in separate graphics files in the selected folder in the designated graphics file format.
Acrobat names these new graphics files by adding sequential numbers (starting with 0001) to the filename of the original PDF document (and tacking on the filename extensions .jpg for JPEG, .png for PNG, .tif for TIFF, and .jpf for JPEG2000 files in Windows). You can rename these numerical files with descriptive, more meaningful filenames either in Windows or the Mac OS or after opening them in an image editing program, such Adobe Photoshop 7.0. If you want to save a single image as its own individual file, select the image with the Select Image tool, right-click, and choose Save Image As on its context menu. In the Save Image As dialog box that appears, choose a location for your new image file on the Save In drop-down list, enter a name for the file in the File Name text box and click Save. Because you can only select either bitmap (.bmp) or JPEG (.jpg) as a file type in the Save As Type drop-down list of this dialog box, use this method to quickly create an image file that you can open, edit, and save in a number of different image file formats in your favorite image editing program.

Editing graphic images from the context menu

When a graphic is selected, you can also edit it using the options available on its context menu. To open a graphic’s context menu, right-click (Control+click on the Mac) the image with the TouchUp Object tool. These context menu options include many of the same options as the context menu for selected text . The following items on the context menu for selected graphics differ from the context menu for selected text:

• Delete: Removes the selected image and places it in the Recycle Bin (Trash on the Mac).
• Delete Clip: Removes any objects that are clipping the selected image (that is, cutting off part of the image in some way). This feature is grayed-out if no clipping occurs in the current document.
• Select All: Selects all graphic objects on the current document page.
• Select None: Deselects all graphic objects on the current document page.
• Edit Image: Opens the selected graphic in the default image-editing program.

When a graphic object is selected, this option changes to Edit Object, and choosing it opens the object in the default page/object editing program. When multiple graphic objects are selected, this option becomes Edit Objects. When no graphic images are selected, this option becomes Edit Page, and choosing it opens the object in the default page/object editing program as well.
When you choose the Edit Image/Object(s)/Page option, Acrobat attempts to launch the program specified as the image editor or the page/object editor in the TouchUp section of the Preferences dialog box and open the selected image or graphic object in the application for editing. If Acrobat cannot launch the specified program, its displays an alert dialog box that informs you of this fact.
To specify a new program as the default image editor or the page/object editor, press Ctrl+K (Ô+K) to open the Preferences dialog box. Then click TouchUp in the list box on the left. To select a new image editor, such as Photoshop 7.0, click the Choose Image Editor button. The Choose Image Editor dialog box appears; open the folder that contains the application, select its program icon, and click the Open button. To select a new page/object editor, such as Illustrator 10, click the Choose Page/Object Editor button. In the Choose Page/Object Editor dialog box, open the folder that contains this application, select its program icon, and click the Open button. When using programs like Photoshop 7.0 and Illustrator 10 as your image editing and graphics object editing programs, respectively, you can make your changes in the programs launched from Acrobat 6 with the Edit Image or Edit Object command, and then, when you save your editing changes to the image or graphic in these programs, they are automatically updated in your PDF document.

Using the layout grid in repositioning graphics

Acrobat has a layout grid that you can use to help you in repositioning graphic images. To turn on the display of the layout grid in the PDF document, choose View➪Grid or press Ctrl+U (Ô+U on the Mac). When working with the layout grid, you can modify the default grid settings in the Units & Guides section of the Preferences dialog box by pressing Ctrl+K (Ô+K on the Mac) and then clicking Units and Guides in the list box on the left. The Layout Grid section of the dialog box contains a number of grid options that you can change:

• By default, Acrobat subdivides each of the major grid squares into three divisions across and three down, making a total of nine little subdivisions. To increase the number of squares in each of the major grid squares, increase the value in the Subdivisions text box.
  
• To offset the layout grid in relation to the top and left margin of the page, enter a value in the Grid Offset from Left Edge and the Grid Offset from Top Edge text boxes.
• By default, Acrobat makes each major grid square one-inch square with one inch between their vertical lines and one inch between their horizontal lines. To make the major grid squares larger so that there are fewer, farther apart, increase the values in the Width Between Lines and Height Between Lines text boxes. To make the grid squares smaller so that there are more, closer together, decrease the values in these text boxes. Note, however, that if you decrease the values in these text boxes too much, Acrobat is no longer able to subdivide the square using the value entered in the Subdivisions text box.
• By default, Acrobat colors the lines in the layout grid blue. To select a new color for all grid lines, click the Grid Line Color button and then click the desired color in the color palette.

Touching up your graphic images

You can use the TouchUp Object tool to select graphic images or other objects that have been embedded in a PDF document. This tool uses an arrowhead with a tiny square icon. You can switch between selecting the TouchUp Text tool and the TouchUp Object tool from the Advanced Editing toolbar by pressing Shift+T. As you hold the Shift key and press T, the arrowhead icon used by the TouchUp Object tool and outlined T icon used by the TouchUp Text tool toggle between one another on the toolbar. To select a graphic with the TouchUp Object tool, you simply click it with the arrowhead pointer. After a graphic is selected (indicated by a gray bounding box around the image or object — there are no sizing handles because you can’t resize graphics in Acrobat), you can then reposition it by dragging its outline to the new position before you release the mouse button. You can also nudge a selected graphic image with the arrow keys: Just press the ←, →, ↑, and ↓keys to move the graphic by small increments until it’s in the desired position.
To select more than one graphic image or object on the page at the same time, Shift+click each object. To select a group of graphic images or objects on the page, drag the TouchUp Object tool to draw a bounding box around all the graphics to select them all together.
When you’re trying to move charts and graphs embedded on the document page (especially those originally generated in a spreadsheet program like Microsoft Excel), drag a bounding box around the entire chart to ensure that you select all the components (such charts are actually composed of a whole bunch of individual graphic objects) before you attempt to reposition it on the document page.