Press thisd hold Function Button.

按住功效按钮。

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You are free to set the name of each function button and the calculation formula behind it.

你可以自由地设置一个功能键和计算公式。

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Manual calibration, using a function button to select the school, the school hours functions, corresponding with another function key set, the score values.

手动校准，用一个功能键选择校时、校分功能，用另一功能键调校对应时、分数值。

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This protrusion (which is removeable) provides access to a multi-function button, volume controls, power switch and micro-USB port for charging.

ENGADGET

The F900EXR also lets users assign frequently-used options to the new "E-fn" or extended function button for enhanced ease of use.

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Further enhancing ease-of-use are a new Function button that delivers quick access to frequently-used settings and a longer-life battery that claims to deliver around 360 shots before recharging becomes an issue.

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