2012年10月14日星期日

Pen Tool Change in photoshop CS6


Pen Tool Change in photoshop CS6

Curve Fit option in Photoshop CS6 Freeform Pen tool
The Curve Fit option lets you adjust the amount of error Photoshop allows when trying to fit your cursor movement to a path. You can enter a value from 0.5 to 10 pixels; the default setting is 2 pixels.
At the default setting, Photoshop doesn’t register any movement of your cursor that’s 2 pixels or less. Setting the value to 0.5 pixels makes the Freeform Pen very sensitive to your movement and forces the tool to follow the edge closely.
The disadvantage of this option is that using it also causes unnecessary anchor points. Although a value of 10 pixels corrects this problem by making the option less sensitive, your path may not be as accurate if you back off on the sensitivity.
Magnetic option in the Freeform Pen
When selected, the Magnetic option makes the Freeform Pen act much like the Magnetic Lasso tool. Click anywhere on the edge of the element you want to select. Release your mouse button and then move the cursor around the edge. The tool snaps to the edge of your element, creating anchor points and segments. You can:
Manually control the magnetism. If the Freeform Pen tool starts to veer off course, you can force an anchor point down manually by clicking. To delete the most recent anchor point, press Backspace (delete on the Mac).
Create straight segments. To create straight segments, Alt-click (Option-click on the Mac) to temporarily get the regular Pen. Alt-drag (Option-drag on the Mac) to temporarily access the regular Freeform Pen. To return to the Magnetic Freeform Pen tool, release Alt (Option on the Mac), click again, and continue moving the cursor.
To close a path by using the magnetic Freeform Pen, double-click or return to your starting anchor point.
The Width, Contrast, and Frequency settings are specifically for the Magnetic option and work just like the Magnetic Lasso options. Width specifies how close to the edge (1–256) the tool must be before it detects an edge. Contrast (1–100) specifies how much contrast must be between pixels for the tool to see the edge. Frequency (0–100) specifies the rate at which the tool lays down anchor points.
The Pen Pressure option is available only if you’re using a pressure-sensitive drawing tablet. It allows you to adjust how sensitive the tool is based on how hard you press down with the stylus.
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