Page 393 - ProShow Producer Manual
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             Smooth

             Smooth motion speed means that your layer is going to accelerate at the
             beginning of the motion, reach a top speed, and begin to decelerate once it
             comes to its stopping point.  This is the default value and looks the most
             natural.

             Accelerate

             Accelerate means that your layer will constantly speed up while moving. It
             will start moving slowly and begin moving faster until it comes to an abrupt
             stop at the end.


             Decelerate

             Decelerate is exactly the opposite of the Accelerate motion style. In this
             case, your layer will start by moving very fast and gradually slow down until
             it stops at the ending point.

             Motion Speed is considered an advanced feature and may not be
             something you work with on a regular basis.  It does have uses in the right
             effects, though.

             As an example, let’s say you’re going to pan a picture of a car across the
             slide.  Rather than use the default Smooth motion (which will start slowly,
             speed up, then slow down), try changing the motion style to Accelerate. As
             the car pans across the screen it will move faster and faster as the slide
             plays.


             Removing Motion

             There are likely to be times when you just want to remove the motion you
             set up on a layer.  There are a couple of different ways to do this depending
             on how much of the motion you want to get rid of.
             Let’s start with getting rid of a specific setting, like Zoom.
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