If your Chromecast picture looks zoomed in or cropped, the fix is almost always on your TV, not the Chromecast. Turn off your TV’s Overscan setting (sometimes called 16:9 Overscan or Just Scan) and set the aspect ratio to a normal or full mode. Restarting the TV and Chromecast first can also clear it.
Applies to
- Chromecast and Google TV streaming devices
- Most fixes are in your TV’s picture settings, not the Chromecast
- No app or account changes needed
Why is my Chromecast zoomed in or cropped?
Most of the time this happens because the TV is using an incorrect aspect ratio or has Overscan turned on. Overscan is a behavior in some televisions where part of the picture is pushed outside the visible edges of the screen, which makes the image look zoomed in or cut off. The Chromecast sends a correct signal, but the TV crops it.
How do I fix a zoomed-in Chromecast picture?
- Restart both your TV and your Chromecast. Unplug the Chromecast for a few seconds and plug it back in.
- Open your TV picture settings and look for Overscan, 16:9 Overscan, or Just Scan. Turn Overscan off, or choose Just Scan if your TV has it.
- Set the aspect ratio to a normal or full mode. If your remote has an aspect ratio button, press it to cycle through the options and stop on the one that fills the screen correctly.
- If you cannot find these settings, search for overscan + your TV model or check your TV manual for aspect ratio or overscan.
What about black bars when casting a Chromebook?
Black bars around the picture are called letterboxing, and they are usually normal. A 3:2 Chromebook such as the Pixelbook or Pixel Slate does not match a 16:9 TV, so when you cast the desktop or a tab you will see black edges. This is expected and is not a fault with your Chromecast.
Frequently asked questions
Is the zoom problem caused by the Chromecast or the TV?
Almost always the TV. The Chromecast sends a standard signal, and the TV’s Overscan or aspect ratio setting is what crops or zooms the picture.
What is Overscan on a TV?
Overscan is a setting where the TV shows part of the picture outside the visible edges of the screen. Turning it off, or choosing Just Scan, shows the full picture as sent by the Chromecast.
Why does my Chromebook cast show black bars?
That is letterboxing. A 3:2 Chromebook screen does not match a 16:9 TV, so black bars appear on the sides. This is normal and not a problem.
Conclusion
A zoomed-in Chromecast is nearly always a TV picture setting. Restart both devices, turn off Overscan, and set a correct aspect ratio to see the full picture again. If you still have trouble, post your TV model in the comments.
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