You can copy and paste with:
- the edit menu
- drag and drop while holding down modifier keys to copy and paste (see below)
- the keyboard shortcuts listed in the menus
Drag And Drop
If you drag from the arrow to the left of the question, page, etc, you can move the item. If you hold down control while you do this, it will copy the object to the new location.
If you hold down control-shift while you drag the item, it will create an identical reference in the new location. This means that the object will appear in two places, and if you change it in one, it will change it in the other automatically.