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Diameter Controls the size of the brush. Enter a
value in pixels or drag the slider.
Brush strokes with different
diameter values
Hardness Controls the size of the hard center of the
brush. Type a number or use the slider to enter a
value that is a percentage of the brush diameter.
Brush strokes with different
hardness values
Spacing Controls the distance between the brush
marks in a stroke. To change the spacing, type a
number or use the slider to enter a value that is a
percentage of the brush diameter. To paint strokes
without defined spacing, deselect this option.
Increasing the spacing
makes the brush skip.
Angle Specifies the angle by which an elliptical
brush’s long axis is offset from horizontal. Type a
value in degrees, or drag the horizontal axis in the
left preview box to set a new angle.
Angled brushes create a
chiseled stroke.
Roundness Specifies the ratio between the brush’s
short and long axes to determine its shape. Enter a
percentage value or drag the points in the left
preview box. A value of 100% indicates a
1pt
6pt
0%
100%
100%
200%
25°
125°
CHAPTER 9 206
Painting
circular brush, a value of 0% indicates a linear
brush, and intermediate values indicate elliptical
brushes.
Adjusting roundness
affects shape of brush tip
Saving, loading, and replacing brushes
The Brushes palette can hold as many brushes as
you want. However, to make the palette more
manageable and to group related or special
brushes, you might want to create your own sets of
brushes. A number of files containing different
brush sets are included in the Adobe Photoshop
program folder.
To save and use custom brush sets:
Choose one of the following commands from the
Brushes palette menu: Reset Brushes to return to the default brushes.
You can either replace the current brush set or
append the default brushes to the current set. Load Brushes to add the brushes stored in a file
to the current palette. Replace Brushes to replace the current brush set
with brushes stored in a file. Save Brushes to save a brush set in a file.
When you exit Adobe Photoshop, the current
Brushes palette is saved in the Preferences file.
Specifying painting and editing
options
You specify options for a painting or editing tool
by using the Options palette for that tool. See
page 24 for more information on using the
Options palette.
Specifying the opacity, pressure, or
exposure
The slider in the Options palette lets you specify
the opacity, pressure, or exposure for various
painting and editing tools. You can determine the
opacity used by the gradient fill, pencil, paint-brush,
and rubber stamp tools. You can adjust the
pressure of action applied by the airbrush,
smudge, blur, sharpen, and sponge tools. You can
also adjust the amount of exposure used by the
dodge and burn tools.
Opacity can range from 1 to 100%. To use trans-parent
paint, specify a low percentage value. To use
more opaque paint, specify a high value.
Pressure and exposure can range from 1 to 100%.
To create a strong effect, specify a high percentage
value. To create a weaker effect, specify a low value.
25%
100%
207
Painting with various
opacity settings
To set the opacity, pressure, or exposure
for any selected painting or editing tool in
multiples of 10%, press a number from 0
through 9. For example, press 5 to choose
50%. Press 0 to choose 100%. To set an exact
opacity or pressure, quickly type the desired
value on the keyboard.
Specifying the paint fade-out rate
You can specify the rate at which the pencil, paint
brush, airbrush, and eraser strokes fade out to sim-ulate
actual brush strokes.
To set a fade-out rate:
1 Select Fade in the tool’s Options palette.
2 Enter a value for the number of steps of the fade.
The steps determine the rate of the fade from the
beginning to the end of the stroke. Each step is
equal to one mark of the brush tip. The value can
range from 1 to 9999. For example, entering 10
steps produces a fade in 10 increments.
3 Choose one of the following options: Transparent to fade the stroke from the fore-ground
color to transparency. Background to fade the stroke from the fore-ground
color to the background color.
Fade-out showing setting of
40, 60, and 80 steps
Specifying stylus pressure options
Adobe Photoshop supports pressure-sensitive
digitizing tablets such as the Wacom Ò and Cal-comp
tablets. If the Control Panel software for
your tablet is installed, you can specify the type of
effect that results from varying the stylus pressure.
These stylus pressure options affect the pencil,
paintbrush, airbrush, eraser, rubber stamp,
smudge, blur, sharpen, dodge, burn, and sponge
tools.
To set the effect of different stylus pressures:
Display the tool’s Options palette, and select one
of the following options: Size if you want increasing pressure to result in a
bigger brush stroke.
50%
100%
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