You’re working on a layout… you have some text and graphics, but you want someone else to work on them to save time. Now with LayoutZone, you can select those objects, choose Edit > Layout Zone > Objects to InDesign Document to convert them into an INDD file which replaces the original objects. At this point, you can give the new InDesign (.indd) file to another designer to work on while you continue to work in the original file. When they’re done, you can just click Update in the Links panel (to update the InDesign document). Or you can choose Edit > Layout Zone > Linked InDesign Page to Objects, to convert that person’s design back into editable pieces in InDesign. This is so much easier than InDesign’s built-in capability to “place” another InDesign file, because you can actually turn the placed file back into editable objects again. Read through the linked article, the download link is near the bottom.