This icon is the symbol for portrait mode and if you're not confident with changing apertures (we'll discuss this below) it's a good mode to switch to as it will do some of the work for you.
其中有一个是头像模式的标志，如你对调整光圈技艺(见下节)并不自信，调到这个模式会让你很省事。
Backlight for LCD, switch and Symbol, display.
LCD背光、转换器，开关和标志，显示器等。
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