Adobe 25510629 - After Effects CS3 Professional, Руководство пользователя

Страница: 40 / 130

40 Product overview
Scene tab
Use the controls on the Scene tab to change the size, position, and orientation of some layers
in the session. You may want to do this if, for example, you need to move the input clip so
that it fits correctly in the scene. These controls are also used when you build your own set
using the Basic sets. The Scene tab also contains a field for setting a pause point in a
VirtualTrak scene.
Pause Point Settings area
This control group displays the preset start time for a pause in a VirtualTrack scene and lets
you set the end time. These controls apply only to virtual sets from a Master Sets Library. All
of the virtual sets that support this functionality have “with Pause” in their names.
Pause Begins At:
Specifies a point in time that is specific to the current virtual set. Virtual
sets with a pause point were created by the designer with the pause. You cannot edit this field,
but it indicates where the pause begins.
Pause Ends At:
Sets the duration of the pause. Enter the end time, which is equal to the
desired pause duration plus the Pause Begins At time.
Size In Screen:
Adjusts the size of the input clip while retaining its baseline position in the
scene. The default size is 1.0.
Set:
Sets the end point of the pause prebuilt into the virtual set using the current frame
shown for the input clip. To use the Set button, drag the preview slider for the input clip to
the time at which you want the pause to end.
Reset:
Deletes the pause by setting the Pause Ends At time to the Pause Begins At time.
Position In Scene area
Grid control:
This is an interactive control for positioning the layer plane. For more
information, see “Changing the position and scale of a layer plane” on page 92 .
Numeric readouts:
You can click in a field and type a value.
X:
Moves the layer plane along the x (horizontal) axis.
Y:
Moves the layer plane along the y (vertical) axis.
Z:
Moves the video plane along the z (depth) axis, which changes the scale of the layer
plane. The z axis is a third dimension added to the x and y grid. The z axis is
perpendicular to both x and y axes. To change this setting, hold down the Shift key while
dragging vertically.
Reset:
Returns all of the values to the default settings. For virtual sets, the coordinates for
the Input Source, and sometimes for other layers, are predefined. In these cases, the Reset
button returns the values to the predefined coordinates, not to 0.00.