Dropbox is focusing on adding features that let employees work together, comment, chat and create, putting Dropbox into competition with Microsoft and Google.
New communication features will include one that lets users highlight a piece of text or image in a file and comment on it. The company also previewed a tool for adding a series of real-time comments at the top of a file, so several people can hold running discussions.
Another future tool will tell users which coworkers are also looking at a file or have viewed it recently -- a Dropbox function that works with Microsoft Office files now, but the company wants to bring it to many other file types and apps.
Later this year, Dropbox also plans to revamp its products to give information technology administrators greater control and added security options, part of its effort to lure more corporate customers.