MACROMEDIA FIREWORKS 8, Руководство пользователя

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Selecting pixels 57
Plotting points to create a marquee selection
The Polygon Lasso tool allows you to select specific pixels in a bitmap image by clicking
repeatedly around the perimeter of the pixel area you want to select.
To select a polygonal area of pixels:
1. Select the Polygon Lasso tool.
2. Select an Edge option in the Property inspector. For more information, see “Bitmap
selection tool options” on page 55 .
3.
Click to plot points around the perimeter of the object or area to outline the selection.
Hold down Shift to constrain Polygon Lasso marquee segments to 45° increments.
4. Do one of the following to close the polygon:
■
Click the starting point.
■
Double-click in the workspace.
Selecting areas of similar color
The Magic Wand tool allows you to select areas of pixels that are similar in color. By adjusting
the Magic Wand’s Tolerance and Edge options in the Property inspector, you can control how
the Magic Wand selects pixels.
To select an area of pixels of similar color range:
1.
Select the Magic Wand tool.
2.
Select an Edge option in the Property inspector. For more information, see “Bitmap
selection tool options” on page 55 .
3. Set the tolerance level by dragging the tolerance slider in the Property inspector.
Tolerance represents the tonal range of colors that are selected when you click a pixel with
the Magic Wand. If you enter
0
and click a pixel, only adjacent pixels of exactly the same
tone are selected. If you enter
65
, a wider range of tones is selected.