zoom in

verb2

1. •
   To increase the focal length of a zoom lens in order to obtain a magnified image, or a close-up.

   • The camera operator will zoom in on the subject for a close-up shot.
   • The photographer decided to zoom in on the details of the flower.
2. •
   To manipulate a display (such as a computer screen) so as to make the image larger.

   • You can zoom in on the map to get a better view of the city.