{% comment %} USK flying-key keyframe controls — keyframe A/B set/jump, the DVE rate entry + Set button, Run-To controls and the infinite-position grid. Included by control/_usk_fly.html (luma/chroma/pattern panels) and directly by the DVE panel (a DVE key IS the flying key, so it carries these controls without the fly enable wrapper). Params: panel 'luma' | 'chroma' | 'pattern' | 'dve' — disambiguates the 'usk--dve-rate' input id across the coexisting panels. {% endcomment %}
Flying Key Controls