Recording Guide
Aspect ratio
Custom ratio
:
Exact width (px)
On-screen size (trace target):
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How to use with macOS
- Set browser zoom to 100% and click Fullscreen.
- Pick a ratio, drag the orange box where you want it, resize from the blue dot.
- Press G to hide controls for a clean target.
- Press ⌘⇧5 → Record Selected Portion.
- Drag the recorder selection over the orange box, matching its size.
- Don't record yet — switch to your real content. macOS keeps the selection region for next time.
Retina note: the recorder shows logical points; the saved video is larger by your display scale. Use arrow keys to nudge 1px (Shift = 10px).