The AnimationSpeed property controls the speed at which an Animation is playing. The default value for AnimationSpeed is 1, which means the amount of time that each AnimationFrame displays is equal to its FrameLength property.
Increasing this value above 1 will make animations play faster.
Setting this value between 0 and 1 will make animations play slower.
Setting this value to 0 will make animations stop (similar to setting Animate to false).
Setting this value to a negative number will make animations play in reverse.
A Sprite's AnimationSpeed can be changed in the FlatRedBall Editor in the Variables tab.