Multiple Pages Preview
定义屏幕上显示的页数。点击该图标旁的箭头以打开网格，选择预览中每行和每列显示的页数。
多页预览
After clicking the icon, move the mouse over the desired number of rows and columns.
More Options
You can also choose settings by clicking to open a new dialog, then use the two spin buttons to set the number of pages to be displayed.
行
定义页中显示的行数。
栏
定义列中显示的页数。