Using Command Post is quite simple. The four major areas of interest are outlined in the illustration on the right.

1. Current Cursor Location
   1. The cursor location indicator shows you what address the cursor is currently pointing.
      
      
2. The Cursor
   1. The cursor allows you to select (arrow keys) and edit individual nibbles by using the 0-9, a-f, and A-F keys on your calculator. On the TI-89, you may use the =(),/ and | keys without turning alpha, or alpha lock on to access a-f. If you require more advanced editing capabilities, use the Edit Dialog.
      
      
3. Hexadecimal View
   1. The hex view shows you the hexadecimal representation of each location of memory, which is currently on screen. The numbers are organized into groupings of two bytes (one WORD).
      
      
4. ASCII View
   1. The ASCII view shows you the ASCII representation for each memory location. There are two hexadecimal numbers per ASCII character shown.

Aside from the preceding list, there are only two caveats to be aware of, and one piece of wisdom to ponder:

1. There are read protected memory areas on the TI-89 / TI-92 Plus / V200 which will be displayed as garbage data in the hex editor.
   
   
2. There are write protected memory areas on the TI-89 / TI-92 Plus / V200 which cannot be written to. If you try to write to one of these areas, you may see a Protected Memory error, or your changes to the memory location will be ignored.
   
   
3. The hex editor is very powerful; changes you make cannot be undone. Make sure that you know what you are editing before changing something. If you do not do this, you run the risk of corrupting the heap, and/or crashing your calculator. The F5 Refresh toolbar option is not there to 'look nice'.