The Animation GUI component can be used to control a scene animation.
The upper slider can be used to set the time index of the animation.
The lower slider can be used to fine-control the animation speed, relative the to the base animation speed, in the range -1 to +1 (in percent). Right-click on the slider to set relative speed to 0. Left-click on the slider label to set the relative speed to +1.
The choice selects the base animation speed, ranging from slow-motion 0.1 x to fast-motion 10 x.
The buttons can be used to control the animation. The text fields show the animation status.
The Play button starts or resumes the animation, using the current speed (which may be zero, see above).