In the Package Manager window, when you select a feature set from the list panel, the details panel on the right displays details for the selected feature set. The details panel presents the contents of the feature set as a kind of miniature Package Manager window:
(A) When you select a feature set from the list panel, its information appears in the details panel.
(B) The display name of the feature set.
(C) The name of the feature set.
(D) A button to Install or Remove the feature set.
(E) A link to the QuickStart guide for this feature set, containing details of how you can use this set of packages together.
(F) Feature set details tabs:
Feature sets are collections of packages that work well together for a specific version of Unity, which means the Package Manager installs specific package versions that your feature set requires. However, there are a couple of reasons why the Package Manager might actually install a different version (override the requested version):
If the Package Manager installs a version other than the one you requested, an information message explains the reason for the change.