Camtasia is an awesome screen recorder to use for publishing Screencasts, Tutorials and YouTube videos. When using the smart focus feature, Camtasia Studio 5 is setup to display a green box or green rectangle when zooming in to sections of your screencast. By default, this green rectangle appears on each zoom in the final production of a video. However, we can easily turn off this feature and keep the green box from displaying in our final screencast production or video.
Camtasia – How to Remove the Green Box on Zoom feature:
Start Camtasia Studio
From the menu bar, navigate to Tools -> Options and click the Zoom tab from the menu that appears
Uncheck the option to Apply Zoom-n-Pan hints and click Ok
Now whenever you produce a final video, the green box will not display on the sections you chose to zoom