nano: The Mark

 
 3.5 The Mark
 ============
 
 Text can be selected by first ’setting the Mark’ with ‘^6’ or ‘M-A’ and
 then moving the cursor to the other end of the portion to be selected.
 The selected portion of text will be highlighted.  This selection can
 now be cut or copied in its entirety with a single ‘^K’ or ‘M-6’.  Or
 the selection can be used to limit the scope of a search-and-replace
 (‘^\’) or spell-checking session (‘^T^T’).
 
    On some terminals, text can be selected also by holding down ‘Shift’
 while using the cursor keys.  Holding down the ‘Ctrl’ or ‘Alt’ key too
 will increase the stride.  Such a selection is cancelled upon any cursor
 movement where ‘Shift’ isn’t held.
 
    Cutting or copying selected text toggles off the mark automatically.
 If needed, it can be toggled off manually with another ‘^6’ or ‘M-A’.