org: Link format

 
 4.1 Link format
 ===============
 
 Org will recognize plain URL-like links and activate them as clickable
 links.  The general link format, however, looks like this:
 
      [[link][description]]       or alternatively           [[link]]
 
 Once a link in the buffer is complete (all brackets present), Org will
 change the display so that ‘description’ is displayed instead of
 ‘[[link][description]]’ and ‘link’ is displayed instead of ‘[[link]]’.
 Links will be highlighted in the face ‘org-link’, which by default is an
 underlined face.  You can directly edit the visible part of a link.
 Note that this can be either the ‘link’ part (if there is no
 description) or the ‘description’ part.  To edit also the invisible
 ‘link’ part, use ‘C-c C-l’ with the cursor on the link.
 
    If you place the cursor at the beginning or just behind the end of
 the displayed text and press <BACKSPACE>, you will remove the
 (invisible) bracket at that location.  This makes the link incomplete
 and the internals are again displayed as plain text.  Inserting the
 missing bracket hides the link internals again.  To show the internal
 structure of all links, use the menu entry ‘Org->Hyperlinks->Literal
 links’.