1. A method comprising: generating a first process for a first document; generating a second process for a second document that is related to the first document; generating a third process for a third document that is related to the first document or the second document; wherein two documents of the first document, the second document, and the third document are included in the other document of the first document, the second document, or the third document when the other document is retrieved from a server at a computing device; generating, by the first process, a message that includes target content that indicates one or more of: time data that indicates when a particular event occurred, presentation data that is to be displayed over the third document, a highlight instruction that the third process is to use to visually distinguish the third document, or user data that the third process uses to dynamically display content or to generate content within the third document; sending, by the first process, the message to the second process; determining, by the second process, that the third process is to receive the target content within the message; and sending, by the second process, the target content to the third process wherein the method is performed by the computing device.