The shape of your frame shapes how your story feels. Aspect ratio, and the letterbox bars that come with widescreen formats, is one of the quickest visual cues that says "this is cinematic." Here's a plain-English guide to aspect ratios and how to add letterbox bars to your footage instantly.
Aspect ratios, explained
Aspect ratio is the width-to-height proportion of your frame. 16:9 is standard for YouTube and TV. 2.39:1 (anamorphic widescreen) is the classic blockbuster shape, wide and immersive, achieved on a 16:9 timeline by adding black letterbox bars top and bottom. 4:3 and 1:1 evoke vintage or social-first looks, while 9:16 vertical rules Reels and TikTok.
Add letterbox bars in seconds
Aspect, Aspect Ratio Frame Overlays is a versatile collection of 4K and HD frame overlays, endorsed by brands like Adidas, that you drag and drop over your footage to instantly set a cinematic ratio. It includes 8mm, 16mm and 35mm film rounded-edge overlays plus dirty aspect-ratio mattes, and works in DaVinci Resolve, Premiere, Final Cut Pro, LumaFusion and iMovie.
Tell two stories at once: split-screen
Want a dynamic, editorial layout? Aspect Split-Screen Overlays provide 50 film split-screen layouts (25 horizontal + 25 vertical) in 4K and HD, perfect for music videos, fashion edits and montages. Drag a frame over your footage, drop clips into each panel, and you've got a polished split-screen sequence.
Add cinematic detail: viewfinder overlays
For an in-camera feel, VIEWS, Viewfinder Overlays gives you 100+ viewfinder graphics (in black and white versions) that frame your shot like you're looking through a camera, with recording dots, focus brackets, battery readouts and more.
How to use aspect overlays
- Drop the overlay on a track above your footage.
- Match resolution (4K or HD) to your timeline.
- Compose for the bars by keeping important action inside the visible frame.
- Stack with grain or a LUT to complete the cinematic look.
Frame your story
Whether you want classic widescreen bars, a striking split-screen, or viewfinder detail, MoonBear's Aspect, Split-Screen and VIEWS overlays make professional framing a drag-and-drop away.