By default the primary monitor is used for slide show mode. If the current desktop is displayed on more than one monitor, you can select which monitor to use for full screen slide show mode. If the current desktop spans only one monitor, or if the multi monitor feature is not supported on the current system, you cannot select another monitor.
默认情况下，主监视器将用于幻灯片放映模式。如果在多个监视器上显示当前桌面，则可以选择要用于全屏幻灯片放映模式的监视器。如果当前桌面只跨一个监视器显示，或者当前系统不支持多监视器功能，则无法选择其他监视器。