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Copy Command (Edit menu)

Use this command to copy selected data onto the clipboard. This command is unavailable unless there is data currently selected. Copying data to the clipboard replaces previously stored content.

Shortcuts
Menu:
Keys: CTRL + C (,), COMMAND + C ()
Example

Assume the current selections made on the document below...

Use the "Copy" command from the Edit menu followed by the "Paste" command from Windows Notepad's Edit menu to copy the desired selection to the clipboard.