At this point, you have a fully functional map pulling data in from multiple sources, including default functionality to pan with the mouse and zoom in and out with the mouse wheel.

此时，您就拥有了一个完全可以发挥作用的地图，可从多个资源拉入数据，包括默认的用鼠标平移以及用鼠标滑轮缩放的功能。

youdao

The map can be moved with a left-click, drag mouse action, and the scale can be changed with the zoom control in the upper left corner of the map.

通过左键单击、拖动鼠标动作可以移动地图，通过地图左上角的缩放控件能够改变地图的比例。

youdao

The zoom controls in the upper left hand corner change the scale of the map.

左上角的缩放控件能够改变地图的比例。

youdao

Use the map controls in the bottom left corner to zoom in and out and move about, or you can use your mouse point to draw a square and zoom in on a specific area.

BBC: Netvibes website

You and your friends can simultaneously type on it, fingerpaint, play on digital piano keys, call up YouTube videos and Flickr images and zoom in on and rotate a map of the world.

FORBES: Gadgets We Love

In our hands-on demo, we stared at a world map, and then used the scroll wheel on a mouse to zoom in on that particular country.

ENGADGET: Hands-on with Tobii REX, a peripheral that brings eye-tracking to any Windows 8 PC (video)