Tools - Magnifying glass

You can launch the magnifying glass from the Main Menu / Tools / Other Tools / Magnifying Glass, as well as from the Display Menu. the tool icon is shown above.

The magnifying glass shows the magnified area around the mouse cursor. Use the slider above at the top of the window to control the magnification size.

You can un-dock the tool window and move it to another place in the document by dragging it by the bar at the top of the window.