A data processing system and computer program product for sharing displayed content. A content displayed on a source computer system is shared with a set of target computer systems, wherein the content is displayed on a target display on each target computer system in the set of target computer systems. In response to a change in the content displayed on the source computer system, a progress in displaying the change in the content on the target display on the each target computer system in the set of target computer systems is identified. An indication of the progress in displaying the change in the content on the target display on the each target computer system in the set of target computer systems is generated at the source computer system.