To Copy Text in the Text Editor Window

Select the text.
Do one of the following:

Right-click and choose Copy from the pop-up menu.

or
Press <Ctrl+C>.

or
Press <Ctrl+Insert>.
Place the insertion point at the desired location for the copy of the text.
If you want to replace text, you can select the text to be replaced.
Do one of the following:

Right-click and choose Paste from the pop-up menu.

or
Press <Ctrl+V>.

or
Press <Shift+Insert>.

Note: The Text Editor can import rich text. To import formatted text, copy it from a supporting application (such as Microsoft Word) and paste it into the editor window.