If a toolbar is longer than can be displayed on screen, it shows an icon at the right or lower edge. Select the toolbar and press PageUp or PageDown to display the remaining icons.
如果图标栏超出了屏幕可显示的长度，则会在右边缘或下边缘显示一个图标。选择图标栏，然后按 PageUp 键或 PageDown 键以显示其余的图标。