Hi,
In PTE AV Studio 12 we added a new speed modifier - "Instant". It allows you to achieve an instant change of any animation parameter between 2 keyframes (without smooth interpolation).You can apply it to Pan, Zoom, Rotate, Opacity and other animation parameters.
If you have 2 keyframes, add the "Instant" modifier to the 1st keyframe.
Download a demo project: Instant Animation.zip
Video example:
Instant Animation.mp4
Screenshot: