A straightforward editor mod for Unity, which adds integrated 'Snap'/'Preview' buttons to the game view bar for rapid A/B comparisons and screenshots.
💾 You can also save/export to file :)
📷 Click ‘Snap’ to capture image of current game view.
👁️ Hold 'Preview' to see it as an overlay.
After Effects has had this feature [great for compositing/mixing] for decades.
I wanted it in Unity,
✨ That's it :)