Want to Record / Stream a Portion of your Screen using OBS Studio?
- Ensure you have a Display Capture source. (This source will default to capturing your entire display.)
- Click on the Displau Capture source and hit CTRL-E to edit the scene transform.
- Use the crop settings below (Crop Left, Right, Top, Bottom) to set the screen crop. You can also crop by ctrl-click-dragging the red points around the scene output preview.
- Next go to the main OBS settings (above the exit button) and then to the Video settings section.
- Change the Base and Output resolution to match the resolution of your cropped area.
- You can now stream or record your cropped screen at full resolution.
It's also good to switch the Recoding Quality (in Output Settings) to Indistinguishable Quality to tame output file sizes.