A change has been made in SOLIDWORKS 2020 that simplifies the process for controlling both the Command Manager and Toolbars.
In previous releases, to enable additional tabs for the Command Manager, you had to right-click directly on an existing tab to access a specific menu that listed all of the available tabs for that file environment.
If you right-clicked anywhere else on the Command Manager or any other toolbar area, you got a different right-click menu that just showed the available toolbars that could be enabled.
SOLIDWORKS 2020 Enhancement
Now in SOLIDWORKS 2020, those two menus have been consolidated in a single right-click menu with logical flyouts:
This menu can be accessed easily by right-clicking on any toolbar or anywhere on the Command Manager.
This small change in behavior makes customizing the SOLIDWORKS interface even easier and more intuitive than before.