 <dd>Indicates <code>char</code>'th character on line <code>line</code>. Lines are numbered from 1 for consistency with other UNIX programs that use this numbering scheme. Within a line, characters are numbered from 0. If char is end then it refers to the newline character that ends the line.</dd>
    
      <dt>(@ x y)</dt>
    
      <dd>Indicates the character that covers the pixel whose x and y coordinates within the text's window are <code>x</code> and <code>y</code>.</dd>
    
      <dt>end</dt>
    
