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。
You can switch mouse buttons if you are left-handed. Just double-click the mouse icon in Control Panel.
如果您习惯用左手，可以交换鼠标左右键功能。方法是双击“控制面板”中的“鼠标”图标。
One index finger to control the left mouse button, middle finger to control the right mouse button.
其中食指控制鼠标左键，中指控制鼠标右键。
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