User Guide

Using Alpha Channels226
To apply an effect to a channel:
1 On the Channels palette, display
and select the channel you want to
work with.
If you want to apply the effect to a
specific area of the channel, make
a selection.
2 Choose an effect from the Effects
menu.
To learn more about image effects,
explore “Using Image Effects” on
page 259.
To feather a channel:
1 On the Channels palette, display
and select the channel you want to
work with.
2 Click the palette menu arrow, and
choose Feather.
3 In the Feather dialog box, type a
number of pixels.
A channel — before and after feathering.
To fill a channel:
1 On the Channels palette, display
and select the channel you want to
work with.
If you want to fill only a specific
area of the channel, make a
selection.
2 In the toolbox, choose a color,
pattern, gradient, or weave from
the corresponding selector.
3 Choose Effects menu > Fill.
4 In the Fill dialog box, enable one
of the following to fill with:
• Current Color
•Pattern
•Gradient
•Weave
Current Color fills with the
current shade of gray.
5 Adjust the Opacity slider.
Note
•
For more information on the Fill
command, refer to “Filling an Area with
Media” on page 118.
To fill a channel based on color:
1 On the Channels palette, display
and select the channel you want to
work with.
2 Choose the Paint Bucket tool
from the toolbox.
3 On the property bar, click the Fill
Image button .
4 Choose one of the following from
the Fill pop-up menu:
• Current Color—fills with the
current color—a shade of gray.
• Grad—fills with the selected
gradient.
• Clone Source—fills using the
current clone source image. If
you haven’t defined a clone
source, Corel Painter fills with
the current pattern.
• Wea ve —fills with the selected
weave.
5 Choose the specific material you
want from the Fill selector.
6 To specify the range of gray to be
filled, type a value in the Tolerance
box, or adjust the pop-up slider.
7 To specify the fill opacity for pixels
outside the Tolerance range, type a