At a device of a sender, a screen capture image is captured from a first portion of data presented on the device by a data source. Historical messaging data is analyzed to compute a set of topics in which the sender has participated. Using a topic from the set of topics as a context, a second portion of the data presented on the device by the data source is searched to extract an additional information from the second portion, the additional information corresponding to the context. the additional information is associated with the screen capture image. The screen capture image and the additional information are caused to be transmitted in a messaging channel.