Hotlinked Modules allow you to insert the contents of external ArchiCAD files (sources) into the currently open Project (host).Hotlinked Modules can be used, for example, to manage the repetitive structures of buildings such as hotels or offices with a large number of identical rooms: if rooms are placed as a hotlinked module file, you can modify all the rooms in one step, by just updating the module’s source file.Moreover, the same structures can be used in multiple projects. This is also a good way to subdivide large projects into easier-to-handle smaller files.