The Edit|Copy as RTF menu item is a toggle switch. Selecting the menu item toggles the switch and also immediately invokes Edit|Copy so that the contents of the clipboard immediately reflect the state of the switch. Turning on Edit|Copy as RTF does not turn off Edit|Copy as HTML. Both can be active at the same time.
When Edit|Copy as RTF is checked, Edit|Cut and Edit|Copy make the cut or copied text available in rich text format on the clipboard in addition to EditPad Pro’s usual clipboard formats. Edit|Cut Append and Edit|Copy Append can append to the rich text already on the clipboard if it was put there by EditPad Pro.
The considerations when copying formatted text explained for Edit|Copy as HTML also apply to Edit|Copy as RTF.