Using Editor for very basic stuff: Drag and Drop not working as expected

I am trying to learn about multi-scene games and working through the tutorial but come stuck where I have added a cylinder, named Pipe, into SceneA and supposed to drag and drop it into SceneB.
I select the object via the Hierarchy and confirm that I have that object by looking at the Inspector window but when I click and hold the left mouse button and then move the mouse the underlying GroundPart and the Pipe all move across the scene.
I thought that as drag and drop is similar to cut and paste I would try that but when I do I end up pasting the GroundPart not the Pipe.
I have been looking for a very basic tutorial on the editor itself so I can practice this sort of activity but failed to find anything that does not dive into deeper activities.
So my request for help is are there any very basic editor tutorials available?