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The transform parameters also correspond to onscreen controls found in the Viewer, which can
be manipulated directly using the pointer.
Manipulating the window position on the Viewer
While many of the onscreen controls correspond to parameters within the Window palette,
some onscreen controls, such as the control points that govern reshaping linear, polygonal, and
Curve windows, are only adjustable via the pointer.
Onscreen controls for window transforms:
To select any window: Click on one of an arrangement of many windows to select it,
making that window’s controls active.
To reposition any window: Drag anywhere within the window’s onscreen control.
Window position corresponds to the Window palette’s Pan and Tilt parameters. For a
Gradient window, drag the center control point.
To resize a Circular window while locking its aspect ratio: Drag one of the four blue
corner points out to enlarge, or inwards to shrink. This corresponds to the Window
palette’s Size parameter.
To squish or stretch a Circular window, altering its aspect ratio: Drag one of the blue
top, bottom, left, or right control points. These adjustments correspond to the Window
palette’s Aspect parameter.
To rotate a window: Drag the top inner white rotate handle, in the middle of the
window. For a gradient, drag the bottom arrow handle.
To alter window softness: Drag any one of the magenta softness handles.
Different window shapes have different sets of handles, which correspond to the
Softness parameters.
To reshape a linear window: Drag any of the white corner handles to corner pin the
window, or drag one of the white top, bottom, or side handles to move an entire side
segment of the window around.
To reshape a polygonal window: Turning on a polygonal window reveals a simple
white rectangle with four corner control points. Click anywhere on the surface of the
rectangle to add additional control points with which to reshape the polygon, and drag
any control point to alter its shape. Polygonal windows are limited to a maximum of
128 control points.
To change the size and aspect of a curve: Shift-drag a bounding box around the
control points you want to transform, and then adjust the corners of the box to resize
the points while maintaining the aspect ratio of the shape, or adjust the top, bottom,
left, or right points to squish or stretch the shape.
To remove control points from polygonal or Curve windows: Middle-click the control
point you want to remove.
Chapter – 120 Secondary Windows and Tracking 2727