Just apply to a layer and it will start scrolling upwards from the original position as soon as the layer starts.
Updated 2006-08-07 with new values.
VFX Tips & Tricks posted weekly to: http://generalspecialist.com/
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//Smooth SD vertical scrolls by Jonas Hummelstrand // Version 1.2.1, http://generalspecialist.com/ // Can be applied to a non-square NTSC comps or to both // square and non-square PAL comps. // Change the following value to an even multiple of 50 for PAL // or to an even multiple of 59.94 for NTSC. // Normal scrolls are 100 for PAL and 119.88 for NTSC // Fast scrolls are 200 for PAL and 239.76 for NTSC // American Idol scroll speeds are 300 for PAL and 359.64 for NTSC intPixelsPerSecond = 100; y=position-((time-inPoint)*intPixelsPerSecond); [position,y]