Navigate to the Assets tool > Systems tab.
Click Create system.

Enter a system name.
Select a system category. The drop-down menu will show system categories that project administrators have preconfigured in the Settings.
Select a status. The drop-down menu will show the status set associated with the category you selected previously. This is also set up by project administrators.
Click Create.

The system will open immediately. You can start adding assets and other systems you want to group, edit details, add references.
To add assets to a system, click Add assets.

Select the assets that you want to group into this system. Use the search field and filter icon
at the top right to search for assets by name or filter for certain assets respectively.

Click Add assets.
To add other systems, from the same Systems page, click the blue arrow icon next to Add assets instead,
and select Add systems.

Select all the relevant systems. Use the search field and filter icon
at the top right to search for systems by name or filter for certain systems respectively.
Click Add systems.
Edit system details.

To add references to project items like forms, issues, RFIs and more that are relevant to this system, click Add references.

Select the project item that you want to reference and use the window to select an existing item or create an item.