underline-hover scaling-height center-to-edges center-to-edges-reverse-return edges-to-center edges-to-center-reverse-return left-to-right left-to-right-reverse-return right-to-left right-to-left-reverse-return

hover center-to-edges-vertical center-to-edges-vertical-reverse-return center-to-edges-horizontal center-to-edges-horizontal-reverse-return bottom-to-top bottom-to-top-reverse-return top-to-bottom top-to-bottom-reverse-return left-to-right left-to-right-reverse-return right-to-left right-to-left-reverse-return

center-to-edges symetrical simultaneous side-by-side