Apple Motion 4 - Manual (Page 878)

Scroll Direction: Sets the direction of the text scroll to vertical or horizontal.
• Vertical: Scrolls the text vertically in the Canvas.
• Horizontal: Scrolls the text horizontally in the Canvas.
Speed Control: Sets the speed of the scroll or crawl to Automatic, Fixed, or Custom.
• Automatic: The speed of the scroll is determined by the length of the behavior in the
Timeline. In other words, the length of the behavior determines how long it takes the
entire layer to scroll or crawl across the Canvas. By default, the duration of an applied
Scroll Text behavior is the same as the layer or group to which it is applied.
• Fixed: Determines the speed of the scroll based on the value in the Scroll Rate parameter
(pixels per second).
• Custom: Specifies the start and end positions (defined as offsets from the current
position) of the scrolling layer.
Scroll Rate Mult: Available when Speed Control is set to Automatic, multiplies the rate
of the scroll by the amount in the slider. Amounts higher than those available in the slider
can be entered in the value slider.
Scroll Rate: Available when Speed Control is set to Fixed, sets the speed of the scroll in
pixels per second.
Reduce Flicker: Modifies the speed of the scroll to reduce flickering on interlaced or
progressive displays. When Scroll Direction is set to Vertical and Speed Control is set to
Automatic or Custom, the options are None, Progressive, or Interlaced. When Scroll
Direction is set to Horizontal and Speed Control is set to Automatic or Custom, the options
are No or Yes.
• None: Available when Scroll Direction is set to Vertical. Has no effect on the speed of
the scroll.
• Progressive: Available when Scroll Direction is set to Vertical, prevents flicker on a
progressive display (such as an LCD television). This is not guaranteed to prevent flicker
on an interlaced display (such as a CRT television).
• Interlaced: Available when Scroll Direction is set to Vertical, prevents flicker on a
progressive display (such as an LCD television) or on an interlaced display (such as a
CRT television).
Note: Because the minimum speed to prevent flicker on an interlaced display is 2 pixels
per frame, and the minimum speed to prevent flicker on a progressive display is 1 pixel
per frame, the Interlaced option may result in faster scroll rates.
• No: Available when Scroll Direction is set to Horizontal, does not modify the scroll
speed in order to reduce flickering on interlaced or progressive displays.
• Yes: Available when Scroll Direction is set to Horizontal, modifies the speed of the scroll
to reduce flickering on interlaced or progressive displays.
878 Chapter 14 Animating Text