vimsynth/modules/swing
modules/sequencing/SWING
Swings a clock: delays every second pulse — the 'and' of each beat pair — by a fraction of the beat. swing 0 is straight, 1/3 a triplet swing (2:1), 1/2 a hard shuffle. Clock a sequencer THROUGH it and its groove swings.

SWING to get this card.Down the left edge of the card, top to bottom.
Down the right edge, in the same order.
Left to right across the face — the dials in the picture.
The full reference — every parameter curve, the patching notes and the worked examples — lives in the manual: docs.vimsynth.com/modules/swing. In the app itself, :help SWING opens the same page without leaving the rack.