In many aspects, the systems and methods described herein include software and hardware for controlling, from one browser window, the display of information in an online document processing application on another browser window. For example, the systems and methods described herein provide a user with the ability to view a presentation slide deck on a first browser window while simultaneously viewing speaker notes for each slide of the slide deck in a second browser window. The systems and methods not only provide the user with the ability to view speaker notes, but also control the slideshow from the second browser window.