Add explanation how user are display in group sync

doc/user/group/saml_sso/index.md

@@ -363,6 +363,13 @@ the user gets the highest access level from the groups. For example, if one grou
 is linked as `Guest` and another `Maintainer`, a user in both groups gets `Maintainer`
 access. 
 
+Users granted:
+
+- A higher role with Group Sync are displayed as having
+  [direct membership](../../project/members/#display-direct-members) of the group.
+- A lower or the same role with Group Sync are displayed as having
+  [inherited membership](../../project/members/#display-inherited-members) of the group.
+
 ### Automatic member removal
 
 After a group sync, users who are not members of a mapped SAML group are removed from