To copy/paste:
Position the cursor at the beginning of the character from which you want to copy. Press Alt + Shift + A to set mark. ( Use arrow keys to highlight the text to copy. Use Alt + 6 to copy (Alternatively, Alt + Shift + 6 ). Navigate to the place you want to paste. Release paste with Ctrl + U.
Nano menu copy/paste (Mac keyboard):
Esc+A = set mark
Shift+Arrow = highlight text
Esc+6 = copy highlighted text
Ctrl+U = paste copied text