Video tab — format, zones and safe zones — The stack editor — VidVertex Docs
Docs/The stack editor/Video tab — format, zones and safe zones

Video tab — format, zones and safe zones

  • Output template — resolution, fps, codec, quality; templates are managed centrally, see Rendering & templates.
  • Layout zones — declare where things belong: a target rectangle for the main video (with its own fit — cover, contain, AI — and tolerance), the text widget, the captions, and the CTA and brainrot overlays. "Declare from current layout" takes what's on the canvas; then fine-tune x/y/w/h. Zones are the stack's layout law: new footage the assembly line swaps in is fitted into the main zone, text and captions are kept inside theirs, and every pool pick for CTA/brainrot is fitted into its zone at render time — assets of any size land where the stack says. Zones draw as dashed boxes while the Video tab is open and travel with stack presets.
  • Platform safe zones — a transport-row toggle overlays the areas each active platform's UI covers (TikTok, Reels, Shorts, Facebook Reels, Snapchat Spotlight, X) as guides. Purely visual, no effect on the render.
  • Cover frame — shows the moment picked in the render preview; clear it here.
TikTok UI guide over the same Founder Hours variantFounder Hours ·TikTok
FIG 1TikTok UI over the same variant.