If you use a screen reader, you might want to select this check box. Some screen readers or screen magnifiers use the system caret to determine which area of the screen to read or magnify.

• 如果使用屏 幕阅读器，可能需要选中此复选框。有些屏幕阅读器或屏幕放大器使用系统插入标记确定要阅读或放大的屏幕区域。