Proview DVR will show an alert when motion occurs on the system. Under the motion detection settings, if Show Message is enabled, a window will slide out from the right-hand side when a motion event occurs. If there's more than one event, you'll see a few thumbnails in there, and you can scroll up and down the list. If the window slides back and you'd like to view those events again, you can move your mouse to the upper right-hand corner and that detection window will slide back out from the right. Click on the Play icon in the thumbnail, and the system will play that recorded event.