To make sure everyone using the same nomenclature and understanding, the following is all I think you need to read before starting this Tutorial. It is not much and is well worth reading a second time, even if you are experienced - it always reveals something new.
The rest will be introduced as we come to it.
Go to the 3D canvas help text:
"Getting started with 3D canvas" - read this page, the link to "Navigation Control", "Mouse Navigation", "Edit Control" and "Mouse
Editing".
Next read and understand (and do) the "Tutorials" :
Finally under "Menus, Toolbars and other Options", read as much as you can, pay particular attention to:
You should now be able to: