Display symbols are the set of character symbols that can be displayed on an LFT.
Each character code passed in KSR data is translated into one of 256 10-bit display symbol codes. Display symbols 0 through 31 (0x1f) represent control functions and have no graphic representations. The display symbols 32 (0x20) through 126 (0x7e) represent the 7-bit ASCII range of characters. These characters, with minor exceptions, are invariant across all of the display symbols. The display symbols 128 (0x80) through 255 (0xff) vary based on the selected font. These codes are predefined to be common across all shared terminals. See AIX Version 4.3 General Programming Concepts for an illustration of each of the supported code sets.
"Understanding Keyboard Mapping.
The chhwkbd command, the mkfont command and the xmodmap command.