To edit, you must "Check Out" a story. This locks it so designers cannot change text while you are editing. Once done, you "Check In" to save changes and unlock it. View Modes:
Files must be stored in a shared location (server, Dropbox, Creative Cloud Files) for the check-in/check-out workflow to function. Adobe InCopy 2020 v15.1.2
Insert notes ( Cmd/Ctrl + N ) for designers without affecting text flow. To edit, you must "Check Out" a story
Never move or rename .icml or .icma files in the operating system (Finder/Explorer). Only move them via InDesign/InCopy to avoid breaking links. Adobe InCopy 2020 v15.1.2