LOOK AT WHAT YOU MADE. Renders frames of a composition and returns them as one labelled contact sheet. Pass atFrames (up to 12), or omit them: the sheet is then an even spread PLUS the joins between your scenes (labelled "end of a scene", "start of a scene", "mid transition") — where a card caught half-way or an empty gap hides. ONE frame comes back large (1560 px), two at 960 — ask for one when you need to see detail: padding, a label off centre, a fill over its border. props are merged over the composition's for this picture only — {partsBoard:true} draws the parts board without changing anything. Each frame reports its content share (how much is not background) — compare frames of one piece: one far below its neighbours is usually a gap between scenes. Use it after every create or update — timing, spacing and whether text fits are things you cannot verify by reading your own source.