Apple Color 1.0 - Manual (Page 226)

226 Chapter 10 Secondaries
3 Click in the Geometry preview area to add control points outlining the feature you
want to isolate, then click on the first control point you created to close the shape and
finish adding points.
The shapes you draw in the Geometry room default to B-spline shapes, which use
control points that are unattached to the shape they create to push and pull the shape
into place (similarly to the B-splines used by the curve controls in the Primary In and
Out rooms). You can also change these shapes to simple polygons if you need a shape
with hard angles rather then curves, by clicking the Polygon button in the Shapes tab.
Note: If you’re not sure how many control points to add to create the shape you want,
don’t hesitate to create a few more then you think you’ll need. It’s easy to edit them
after they’re created, but you can’t add or remove control points to shapes that have
already been created.
4 If necessary, edit the shape to better fit the feature you’re trying to isolate by dragging
the control points to manipulate the shape.