Document editors have the ability to collapse or expand some part of a file content they are viewing (as an example). However, the few editors that already provide such a feature only provide it for a particular file type or using reserved language words. However, this system (as an example) makes the Collapse/Expand feature available to any file, while it accords strictly to the piece of text the user is writing. Thus, the Collapse/Expand feature might be bound and transferable with any paragraph of the file. A user is able to choose the delimiters of such a collapse action according to its own style and the document type.