The article "Edit" menu
When you open the "Edit" menu (just click on it), the "Edit" commands will become visible:
"Undo last edit"
This command erases the last change.
This command copies the selected text onto the Windows clipboard, then deletes it from the article.
Please note that if nothing is selected, the entire article is cut to clipboard.
Copies the selected text onto the Windows clipboard. If nothing is selected, the entire article is copied.
Pastes the text from the Windows clipboard into the article (at the current cursor position).
If a block of text is selected, then "Paste" replaces the selected text block.
Deletes the selected block of text.
If nothing is selected, then the entire article text is deleted. But not before a confirmation message pops up allowing you to cancel the action.
The items in the "Edit" menu can also be found inside the article popup menu (which can be opened by right-clicking on the article).