If you are purchasing a brush set, these are the digital
equivalent of rubber stamps. They are in colors on the preview because the designer
"stamped" them in color. These come as both .png files and an .abr
brush file. The .png files are usually in black on a transparent background.
You can load the .abr file into your brush palette and "stamp" it in
any color you like.
To change the color of the .png file in Photoshop or PSE, drag
the .png onto a background document. Select the .png layer and press
Shift + Backspace to bring up the Fill Dialog. (Note: on some systems, pressing
Shift + Delete will activate the Fill Dialog.)
From the Contents section, you can fill your layer with a variety of options -
foreground color, background color, or a color of your choice. You can choose
any loaded pattern, black, white or 50% grey.
Check the Preserve Transparency box at the bottom left corner of the Dialog box
to fill just the opaque pixels. Leaving this unchecked will cause the software
to fill your entire layer.
To stamp the brushes in color:
Create a new layer
Set your foreground color by clicking the Foreground color chip at the bottom
of the tool palette. Choose a new color from the color picker.
Select the brush tool.
Choose the brush shape you wish to use from the drop-down menu in the Options
bar across the top of the editing window.
Position the cursor (now the shape of the brush) and click to "stamp"