ScreenSage ProLocal Magnifier
The local magnifier works like a magnifying glass that follows the cursor: only the area around the pointer is enlarged and the whole picture doesn't move. By default, a new zoom magnifies the whole frame. In the interface, it's one presentation mode of a zoom segment; in the timeline's Add menu it reads "Magnify around the cursor".
1. Add a local magnifier
Click Add on the timeline, choose the local magnifier under zoom, then click on the timeline to place it. You can also select an existing zoom segment and change its presentation mode to Local Magnifier in the inspector.
2. Adjust size and magnification
With the segment selected, adjust Magnifier Size and the magnification in the inspector.
3. Make all local magnifiers match
After tuning one segment, open the more-actions menu next to the size and choose Apply to All Local Magnifiers… to apply that size to every local magnifier in the project. Other settings stay unchanged.
When viewers need the surrounding context, such as code and its output on the same screen, a local magnifier works better than zooming the whole frame.
Related: Manual Zoom, Zoom Overview.