5. Introduction
As you work with Adobe Photoshop, you’ll
discover that there is often more than one way
to accomplish the same task. To make the
best use of the extensive editing capabilities
in these programs, you first must learn to
navigate the work area.
9. Overview
Learning how to select areas of an image is of
primary importance— you must first select what
you want to affect. Once you’ve made a
selection, only the area within the selection can
be edited. Areas outside the selection are
protected from change.
11. section1: Practicing making selections
In this section, you’ll experiment with making
selections before you begin working in earnest on
your sample files. By working with the tools in a
practice session, you’ll understand better how
the basic tools work and how to use them. You’ll
A
C
B
D
also learn about selecting and moving as a twostep process. In Photoshop, you first select the
part of an image you want to move with one of the
selection tools. After you select it, you can then
A. Marquee tool
B. Move tool
C. Lasso tool
D. Magic wand tool
use another tool to move the selected pixels to
another location.
sections
12. section1: Practicing making selection
1.1: Selecting and deselecting an area of an image.
1.2: Repositioning a selection border while creating it.
13. 1.1: Selecting and deselecting an area of an image.
You’ll start practicing selection techniques using the rectangular
marquee tool.
1.
In the toolbox, select the rectangular marquee tool.
2.
Drag diagonally from the upper left corner to the lower right
corner of the book to create a rectangular selection.
You can move a selection border after you’ve drawn it.
14. 3.
Drag from the book to a different area of the image window.
Note: Repositioning techniques for selection borders work with any
of the marquee, lasso, and magic wand tools.
4.
Choose Edit > Deselect. Or, you can deselect by clicking
another area in the window, outside the selection border.
15. 1.2: Repositioning a selection border while creating it.
1.
Select the zoom tool, and click the black oval on the right side of
the image window as needed to zoom in to at least 100% view.
2. Select the elliptical marquee tool hidden under the rectangular
marquee tool.
16. 3.
Move the pointer over the oval, and drag diagonally across the
oval to create a selection.
4.
Still holding down the mouse button, hold down the spacebar
on your keyboard and drag the selection.
17. 5.
Carefully release the spacebar, and continue to drag, trying to
make the size and shape of the selection match the oval as
closely as possible.
6.
When the selection border is positioned and sized correctly,
release the mouse button.
18. section2: Moving selection contents
Now that you’ve had some experience with a couple of
methods of making selections, you’re ready to start using
selections to make changes in your image. In the previous
procedures, you made selections with various tools and used
different keyboard combinations to help you make them, but
you did not change the image.
sections
19. section2: Moving selection contents
2.1: Selecting from a center point.
2.2: Moving and changing the pixels in a selection.
2.3: Moving and duplicating simultaneously.
20. 2.1: Selecting from a center point.
1.
In the toolbox, select the zoom tool.
2.
Scroll to the globe in the lower left area of the image, and click
the zoom tool to increase the magnification to about 300%.
3.
In the toolbox, select the elliptical marquee too.
4. Move the pointer to the approximate center of the globe.
21. 5.
Click and begin dragging. Then without releasing the mouse
button, hold down Alt (Windows) or Option (Mac OS) and
continue dragging the selection to the outer edge of the globe.
6.
When you have the entire globe selected, release the mouse
button first and then release Alt or Option (and the Shift key, if
you used it, too).
22. 2.2: Moving and changing the pixels in a selection.
1.
Choose View > Fit on Screen to adjust the magnification so that
the entire image fits within the image window.
2. In the toolbox, select the move tool. Notice that the globe
remains selected.
3. Position the pointer within the globe selection.
23. 4. Drag the globe above the book image, somewhat close to the
right edge.
5. Choose Image > Adjustments > Invert.
The colors making up the globe are inverted, so that it is now effectively
a color negative the original.
24. 2.3: Moving and duplicating simultaneously.
1.
Using the move tool, hold down Alt (Windows) or Option (Mac
OS), and position the pointer within the globe selection.
2. Continue holding down Alt or Option, and drag a duplicate of
the globe down and to the right. Release the mouse button and
Alt or Option, but do not deselect the duplicate globe.
25. 3.
Choose Edit > Transform > Scale to activate a bounding box
around the selection.
4. Hold down Shift and drag one of the corner points to enlarge the
globe so that it is larger than the original by about half. Then press
Enter to commit the transformation and hide the bounding box.
26. 5.
Hold down Shift+Alt (Windows) or Shift+Option (Mac OS), and
drag a new copy of the second globe down and to the right.
6.
Repeat steps 3 and 4 for the third globe, making it about twice
the size of the first one.
7. When you are satisfied with the size and position of the third
globe, choose Select > Deselect, and then choose File > Save.
27. section3:Selecting with the magic wand tool
1. Select the magic wand tool.
2.
In the tool options bar, enter 70 in the Tolerance text box to
increase the number of similar tones that will be selected.
3.
Using the magic wand tool, click what looks like the surface of
the large number ―5‖ image.
sections
28. 4. To select the remaining area of the number ―5,‖ hold down Shift,
so that a plus sign appears with the magic wand pointer,
indicating that whatever you click will be added to the current
selection. Then click one of the unselected areas of the blue
number ―5.‖
Initial selection
Adding to selection Complete selection
(Shift key depressed)
29. 5. Continue adding to the selection until all the blue areas are
selected.
6.
With all of the ―5‖ selected, hold down Ctrl (Windows) or
Command (Mac OS) and drag the number to the area to the
upper left of the book image.
7.
Choose Select > Deselect.
33. Overview
Adobe Photoshop uses masks to isolate and
manipulate specific parts of an image. A mask
is like a stencil. The cutout portion of the mask
can be altered, but the area surrounding the
cutout is protected from change. You can create
a temporary mask for one-time use, or you can
save masks for repeated use
35. Section1: Creating a quick mask
1. Select the magic wand tool.
2. In the tool options bar, enter 12 in the Tolerance text box.
3. Click anywhere in the white area of the egret to begin the
selection process.
4. To extend the selection, hold down Shift and click the magic
wand on another white portion of the egret.
Magic wand selection
Selection extended
sections
36. 5. Select the Quick Mask mode button in the toolbox. By default,
you have been working in Standard mode.
A. Standard mode
B. Quick Mask mode
Quick mask selection
showing red overlay
37. Section2: Editing a quick mask
Next, you will refine the selection of the egret by adding
to or erasing parts of the masked area. You’ll use the
brush tool to make changes to your quick mask. The
advantage of editing your selection as a mask is that you
can use almost any tool or filter to modify the mask. (You
can even use selection tools.) In Quick Mask mode, you
do all of your editing in the image window.
sections
38. 1. To make the foreground color white, select the Switch
Foreground and Background Colors icon above the foreground
and background color-selection boxes.
2. Select the zoom tool and magnify your view of the image, if
needed.
3. Select the brush tool.
39. 4. In the tool options bar, make sure that the mode is Normal. Then
click the arrow to display the Brushes pop-up palette, and select
a medium-sized brush, such as one with a diameter of 13 pixels.
5. Using the brush tool, begin painting over the red areas within the
egret’s body. As you paint with white, the red areas are erased.
Unedited mask
Painting with white
Result
40. 6. Continue painting with white to erase all of the mask (red) in
the egret, including its beak and legs.
Standard
mode
Edited mask in
Standard mode
Quick mask
selection
7. Once you’ve erased all of the red areas within the egret, click the
Standard mode icon again to view your quick mask as a selection.
8. If necessary, zoom out so that you can see the entire image.
41. Section3: Creating a gradient mask
1. In the Channels palette, create a new channel by clicking the
New Channel button at the bottom of the palette.
2. Double-click the Alpha 1 channel and type Gradient to rename it.
3. Select the gradient tool.
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42. 4. In the tool options bar, click the arrow to display the Gradients
picker and select the Black, White gradient.
5. Hold down Shift to keep the gradient vertical, and drag the
gradient tool from the top of the image window to the bottom of
the window.
46. Overview
Adobe Photoshop includes a variety of tools
and commands for improving the quality of a
photographic image. This lesson steps you
through the process of acquiring, resizing, and
retouching a photo intended for a print layout.
The same workflow applies to Web images.
48. Section1: Straightening and cropping an image
1. select the crop tool. Then, in the tool options ensions (in inches)
of the finished image: For Width, type 2 and for Height type 3.
2. Draw a marquee around the image. As you drag, the
marquee retains the same proportion as the dimensions
you specified for the target size (2 x 3).
sections
49. 3. In the tool options bar, make sure that the Perspective
check box is not selected.
4. In the image window, move the pointer outside the crop
marquee, so that it appears as a curved double arrow. Drag
clockwise to rotate the marquee until it is parallel with the edges
of the pictured window frame.
50. 5. Place the pointer inside the crop marquee, and drag the
marquee until it contains all the parts of the picture you want
shown to produce an artistically pleasing result. If you also
want to adjust the size of the marquee, drag one of the corner
handles.
Initial crop marquee
Marquee rotated
Marquee moved
Marquee resized
51. 6. Press Enter. The image is now cropped, and the cropped image now fills
the image window, straightened, sized, and cropped according to your
specifications.
Image cropped
52. Section2: Replacing colors in an image
1. Select the rectangular marquee tool, and draw a selection
border around the blue wall at the top of the image.
2. Choose Image > Adjustments > Replace Color to open the
Replace Color dialog box. By default, the Selection area of
the Replace Color dialog box displays a black rectangle,
representing the current selection.
sections
53. A. Single-color eyedropper tool
B. Eyedropper plus tool
C. Eyedropper minus tool
A B C
3. Select the first (single-color) eyedropper tool in the Replace
Color dialog box and click anywhere in the blue-wall area of
the image window to select all of the area with that color.
54. 4. In the Replace Color dialog box, select the eyedropper-plus
tool, and drag over the other areas of the blue wall until the
entire wall shape is highlighted in white in the dialog box.
5. Adjust the tolerance level of the mask by dragging the
Fuzziness slider or typing 80.
55. 6. If there are any white areas of the mask display in the dialog
box that are not part of the wall, select the eyedropper-minus
tool and click in the black area around the selection in the
Replace Color dialog box to remove most of the white.
56. 7. In the Transform area of the Replace Color dialog box, drag
the Hue slider to –40, the Saturation slider to –45, and the
Lightness slider to 0.
8. Click OK to apply the changes.
57. Section3: Replacing colors in an image
1. In the toolbox, select the dodge tool.
2. In the tool options bar, select the following settings:
For Brush, select a fairly large feathered brush on the Brush pop
up palette, such as 27. Then click outside the palette to close it.
In the Range pop-up menu, select Highlights.
For Exposure, type or use the pop-up slider to enter 15%.
sections
58. 3. Using vertical strokes, drag the dodge tool over the window
curtains to bring out the details. You don’t always need to use
vertical strokes with the dodge tool, but they work well with this
particular image. If you make a mistake or don’t like the results,
choose Edit > Undo and try again until you are satisfied with the
results.
Original
Result
65. 6. How can you use the crop tool in photo
retouching?
Review the answer
66. 1. Only the area within the selection
can be edited.
Back
67. 2. To add to a selection, hold down Shift, and
then drag or click the active selection tool
on the area you want to add to the selection.
To subtract from a selection, hold down Alt
(Windows) or Option (Mac OS), and then
drag or click the active selection tool on the
area you want to remove from the selection.
Back
68. 3. Quick masks are helpful for creating
quick, one-time selections. In addition,
using a quick mask is an easy way to
edit a selection using the painting tools.
Back
69. 4. The quick mask disappears when you
deselect it.
Back
70. 5. The term resolution refers to the number of
pixels that describe an image and establish its
detail. The three different types of resolution
include image resolution, measured in pixels
per inch (ppi); monitor resolution, measured
in dots per inch (dpi); and printer or output
resolution, measured in ink dots per inch.
Back
71. 6. can use the crop tool to trim, scale, and
straighten an image.
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