The software lets you zoom in so you can check the details of any part of the picture.
Etymology: based on the literal meaning of zoom in (= to move quickly toward something)
zoom in (on someone or something)
To make an object or image look larger or closer through the use of an optical device or a digital simulation. The pioneering sports cameraman was known for zooming in on the ball when it was in the air.Can you zoom in and sharpen the image a bit? I want to get a look at the suspect's face.
zoom in on
1. Obtain a close up view of the subject with a camera, as in The TV people zoomed in on the Olympic gold medalist. [Mid-1900s]
2. Focus on, examine closely, as in The moderator got the panelists to zoom in on the health-care issue. [Second half of 1900s]