可以通过添加或删除按钮、更改图标大小、显示或隐藏文字标签来自定义工具栏。
You can customize the toolbar by adding or removing buttons, changing the size of ICONS, and showing or hiding the text on labels.
当它移到工具栏中时变成了方形，没有文本而获得了象形文字，即一个图标。
When it moved to the toolbar, it became square, lost its text, and acquired a pictograph, an iconic legend.
提供一个工具栏可以方便地进行页面操作，或者将页面文字作为语音输出。
Accessibility toolbar enabling easy manipulation of web page display and text-to-speech output.
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