Animations are calculated using a computer method known as ' tweening ', where the computer calculates the actors' position between keyframes for you so you don't have to manually position your actors every single frame. The 'Pose Editor' ('PE') uses the technique of 'keyframe animation' to create motion. 'VX' & 'V11' support up to 4 actors that are little more than poseable mannequins.
In TK17, 'poses' are short animations (a single frame 'animation' is a static pose) of your actors in differing situations. Despite the name, 'Poses' aren't necessarily static.