By default, 'back' and 'forward' commands are assigned to the G4 and G5 buttons: the two lowest down buttons on the left-hand side of the mouse.

默认情况下，'回'和'前进'命令分配给G4和G5的按钮：两个最低的鼠标的左侧向下按钮。

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She liked the dress that buttons down the back.

她喜欢从背部扣纽扣的女装。

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You can also use it to perform gestures to replicate the Android buttons -- hold and swipe up for Menu, down for Home and left for Back.

ENGADGET: AT&T Galaxy Note review Mobile