Before I made this post, I did make a search and found another user with the same problem a while back. Somebody responded to him and told him to check Preferences to see if Gizmo is checked, and that seemed to work for him. However, it's not working for me. I've not only checked Preferences, I've even done Ctrl-Q, but that gizmo just won't appear.
I'm currently using the Trial version, but the fact that I'm getting stuck on this is driving me crazy. Can someone please advise?