You can copy one or multiple items (Test Cases, Test Steps Test Suites, Event Handlers) from within editors and paste them into the same editor or another editor.
Copy and Paste has some restrictions:
Copying items can only be performed from non-dirty (i.e. saved) editors: save your editor before copying items.
The clipboard of the ITE will be cleared when a project is opened or refreshed, and when a copied item is deleted
Performing refactor actions will also clean the ITE clipboard
Event Handlers can only be copied from the Event Handler area to the Event Handler area
You can use the context menu entries to copy and paste items, or you can use the standard platform key combinations to copy and paste.
If you require the same items in the same order multiple times, it might be worth creating a reusable module using, e.g. the Extract Test Case function. This will make test maintenance easier.