Computing term for resizing or changing the magnification of a display, image, or interface element.
This software makes it easy to scale images.
地図アプリで拡大縮小するにはピンチ操作を使います。
To zoom in and out on the map app, use a pinch gesture.
拡大 means enlargement or magnification, while 拡大縮小 covers both enlargement and reduction as a single concept.
縮小 means reduction or shrinking, while 拡大縮小 covers both directions of scaling.
Compound of 拡大 (enlargement) and 縮小 (reduction), directly describing the combined concept of scaling up and down.