In order to copy an attachment, click the box
next to the attachment you wish to duplicate. Click on
from the side menu and a confirmation pop-up will appear.

Click
in order to make a copy of the attachment. The copied attachment will appear on the list as "Created".

If you wish to edit or view the attachment, simply click on
to open it.
Note: You will only be able to edit the copy if this is saved in an editable format (eg: .doc) and if you have the necessary User Settings on your computer.