The Polynomial 203 Motion-Law is not available directly with the Motion-Law Selector.
You can edit the start and end of a Flexible-Polynomial motion-law be the same as the Polynomial 2-3.
Polynomial 2-3 is a Traditional Motion-Law
This segment is included for reference.
A different name for this motion-law is a Parabolic Velocity.
This motion-law is not usually recommended.
The maximum velocity is the lowest of the Traditional Motion-Laws.
Polynomial 2-3 and Flexible Polynomial Motion-Laws
If you can put a Flexible Polynomial motion-law before and after the Polynomial 2-3 segment, then it is possible to make sure the motion is continuous in position, velocity and acceleration.
However, it is best to make all of the segments a Flexible Polynomial.