Adobe PHOTOSHOP 6.0 Manual page 153

4 For the magnetic lasso tool (Photoshop),
set any of these options:
• To specify a detection width, enter a pixel value
between 1 and 40 for Width. The magnetic lasso
detects edges only within the specified distance
from the pointer.
• To specify the lasso's sensitivity to edges in the
image, enter a value between 1% and 100% for
Edge Contrast. A higher value detects only edges
that contrast sharply with their surroundings;
a lower value detects lower-contrast edges.
To specify the rate at which the lasso sets
•
fastening points, enter a value between 0 and 100
for Frequency. A higher value anchors the
selection border in place more quickly.
On an image with well-defined edges, try a higher
width and higher edge contrast, and trace the
border roughly. On an image with softer edges,
try a lower width and lower edge contrast,
and trace the border more precisely.
To change the lasso cursor to indicate the lasso
•
Width value in the options bar, press the Caps
Lock key on the keyboard. Change the cursor
while the tool is selected but not in use.
• If you are working with a stylus tablet, select or
deselect the Stylus Pressure option. When the
option is selected, an increase in stylus pressure
will cause the edge width to decrease.
While creating a selection, you can press ] to
increase the magnetic lasso edge width by
1 pixel; press [ to decrease the width by 1 pixel.
Using the magic wand tool
The magic wand tool lets you select a consistently
colored area (for example, a red flower) without
having to trace its outline. You specify the color
range, or tolerance, for the magic wand tool's
selection.
Note: You cannot use the magic wand tool on an
image in Bitmap mode.
To use the magic wand tool:
Select the magic wand tool ( ).
1
In the options bar, specify whether to add a new
2
selection ( ), add to an existing selection ( ),
subtract from a selection ( ), or select an area
intersected by other selections ( ). The magic
wand cursor changes depending on which option
is selected.
For Tolerance, enter a value in pixels, ranging
3
from 0 to 255. Enter a low value to select colors
very similar to the pixel you click, or enter a higher
value to select a broader range of colors.
4 To define a smooth edge, select Anti-aliased.
(See "Softening the edges of a selection" on
page 147.)
5 To select only adjacent areas using the same
colors, select Contiguous. Otherwise, all pixels
using the same colors will be selected.
6 To select colors using data from all the visible
layers, select Use All Layers. Otherwise, the magic
wand tool selects colors from the active layer only.
7 In the image, click the color you want to select.
If Contiguous is selected, all adjacent pixels within
the tolerance range are selected. Otherwise, all
pixels in the tolerance range are selected.
ADOBE PHOTOSHOP 6.0 143
User Guide