RSLogix 5000 is a software platform used for programming and configuring Allen-Bradley ControlLogix, CompactLogix, and MicroLogix controllers. Version 20.04 is a specific release of the software.
You're looking for information on RSLogix 5000 version 20.04 and its features. Here's what I found:
To download RSLogix 5000 version 20.04, you can visit the Rockwell Automation website. You will need to create an account or log in to your existing account to access the software.