v16.4 generally required Windows 10 (version 1809 or later) or macOS 10.14 and higher.
This version has reached its official end-of-life status and is no longer actively supported by Adobe. Adobe InCopy 2021 v16.4
Adobe InCopy allows writers and editors to style text, track changes, and perform simple layout modifications without overwriting a designer’s work in the corresponding InDesign file. Adobe InCopy 2021 v16.4
Version 16.4 was released as part of the Adobe 2021 suite, following the major v16.0 update in October 2020. Adobe InCopy 2021 v16.4
Ability to save documents as InCopy templates ( .icmt ) to streamline repetitive projects.