When storing a file in the shared space of the network, it should be readily accessible to all users, so design the file to be opened multiple times. The granularity of concurrent access depends on the file type; that is, for some files you may only support concurrent access by word, paragraph, section, page, and so on. Provide clear visual cues as to what information can be changed and what cannot. Where multiple access is not easily supported, provide users with the option to open a copy of the file, if the original is already open.