Sample TDE screen
--------------------------------------------------------------------------------

    +--- File number - each window opened to same file has same number
    | +--- Window letter
    | |
    | |    +--- Dirty file indicator - asterisk
    | |    | +--- File name
    | |    | |                    +---- File attributes
    | |    | |                    |    +---- Total number of lines in file
    | |    | |                    |    |    +--- CR, CRLF, BIN mode
    | |    | |                    |    |    |             +--- line:column
    . .    . .                    .    .    .             .
 +--------------------------------------------------------------+
 |    The first line on the screen contains file information    |
 |--------------------------------------------------------------|
 |.........1......     Optional ruler line    .......7.........8|
 |--------------------------------------------------------------|
 |                                                              |
 |                                                              |
 |                          File area                           |
 |                                                              |
 |                                                              |
 |                                                              |
 |--------------------------------------------------------------|
 |                 Editor modes and information                 |
 +--------------------------------------------------------------+
   .   .    .    .    .    .    .     .     .   .  .    .     .  Insert
   |   |    |    |    |    |    |     |     |   |  |    |     +- Overwrite
   |   |    |    |    |    |    |     |     |   |  |    +----- Z at eof?
   |   |    |    |    |    |    |     |     |   |  +----- trim trailing
   |   |    |    |    |    |    |     |     |   |   space at eol, T = TRUE
   |   |    |    |    |    |    |     |     |   |
   |   |    |    |    |    |    |     |     |   +--- character under cursor
   |   |    |    |    |    |    |     |     +----- CRLF or LF at eol?
   |   |    |    |    |    |    |     +----- word wrap indicator
   |   |    |    |    |    |    +----- Sync cursor in all windows?
   |   |    |    |    |    +----- Ignore / Match search case?
   |   |    |    |    +----- Indent mode?
   |   |    |    +----- Tab modes = Smart/Fixed, In/Deflate, and ptabs
   |   |    +----- Available memory for editing files
   |   +----- Total number of windows, including hidden windows
   +----- Total number of open files