Abstract: A facility is described for providing shared telepointers and for enabling hosts and participants to highlight portions of documents or applications using the shared telepointers. In various embodiments, the facility establishes a sharing session wherein an application executing on a host computing device is shared with a participant computing device, receives at the host computing device an indication from a participant computing device to identify a region to users in the sharing session, draws the identified region on a display device associated with the host computing device, and causes the identified region to be drawn on a display device associated with the participant computing device. In various embodiments, the region is a spot region or a highlighted region that is drawn in a color associated with a user of the participant computing device.

Abstract: A facility for annotating media files is described. In various embodiments, the facility displays a timeline indicating a duration of the media file, determines that an annotation is associated with the media file, and displays in an area near the timeline an indication of the associated annotation. In various embodiments, the facility displays a timeline indicative of a duration of the media file, receives an indication to add an annotation at an annotation time relative to the duration of the timeline, receives and stores an annotation, associates the annotation with the annotation time, and displays an indication of the stored annotation at an area near the timeline.

Abstract: A notification system, upon receiving an indication of an event, determines whether the user has requested to suppress event notifications. When the user has requested to suppress event notifications, the notification system suppresses the event notification by not notifying the user of the event. When the user has not requested to suppress event notifications, the notification system infers whether the user wants to suppress event notifications. When the notification system infers that the user does not want to suppress event notifications, the notification system provides to the user a normal event notification. When the notification system infers that the user does want to suppress event notifications, the notification system provides to the user a modified event notification.