Adobe 25510629 - After Effects CS3 Professional, Руководство пользователя

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34 Product overview
Sliders
Ultra provides many sliders. Dragging is the main method for adjusting a slider, but it isn’t
the only method. After you click a slider, you can also make fine adjustments by using the
Right Arrow and Left Arrow keys. You can also enter values in the text boxes associated with
some sliders.
Grid controls
Ultra provides several grid controls that you use by dragging vertically or horizontally,
sometimes while you hold the Shift or Ctrl key. For fine control, hold down the Alt key while
dragging; this refines the response by a factor of 10. As with sliders, you can enter a value in
the numeric fields next to a grid control.
For more information about individual controls, see the following sections:
“Setting the size, position, and orientation of a layer plane” on page 91
“Moving and scaling an input within the layer plane: Input Offset controls” on page 95
“Panning and zooming” on page 99
Timecode fields
Trimming a video clip and specifying its start time, defining pause points, and programming
pan and zoom moves all involve setting timepoints based on the time either in a given video
clip or in the overall session. You can set these timepoints by dragging the preview slider to
the desired frame and clicking the Set button for the appropriate control, or by typing the
value in the text box. If you enter a timecode manually, do not click the Set button, because
that overwrites the value you typed with the current timecode for the active layer.