Following @ben’s comment on video about placing objects on the ground using the editor, follow these steps:
- Make sure that your editor is set to move the pivot of the object, not the center.
(There’s a button on the top left of your editor to choose between pivot/center, right next to the local/global button.) - Hold shift+apple (Mac) or shift+ctrl (Windows), click the center of the game object’s gizmo and drag it around to where you see fit