Here's a box diagram for a simple example: "The quick brown fox jumped.
Four score and seven", written in a proportional serif font named "Roman".


                  +-----------------------+
                  |                       |
                  |   'FORM'        86    |  FORM 86 FTXT
                  |                       |
               -- +-----------------------+
               |  |                       |
               |  |   'FTXT'              |
               |  |                       |
               |  |  +-----------------+  |
               |  |  | 'FONS'      10  |  |  .FONS 10
               |  |  |-----------------|  |
               |  |  | 01, 00, 02, 02  |  |
               |  |  |-----------------|  |
               |  |  | Roman\0         |  |
               |  |  +-----------------+  |
               |  |                       |
               |  |  +-----------------+  |
          86  <   |  | 'CHRS'      27  |  |  .CHRS 27
         bytes |  |  |-----------------|  |
               |  |  | The quick brown |  |
               |  |  | fox jumped      |  |
               |  |  +-----------------+  |
               |  |    0                  |
               |  |  +-----------------+  |
               |  |  | 'CHRS'      20  |  |  .CHRS 20
               |  |  |-----------------|  |
               |  |  | Four score and  |  |
               |  |  | seven           |  |
               |  |  +-----------------+  |
               |  |                       |
               -- +-----------------------+

The "0" after the first chrs chunk is a pad byte.