gdb-memory-format-menu
    
    gdb-memory-format-menu is a variable defined in `
gdb-mi.el'.
Its value is shown 
below.
Documentation:
Menu of display formats in the header line.
Value: 
(keymap
 (hexadecimal menu-item "Hexadecimal" gdb-memory-format-hexadecimal :button
	      (:radio equal gdb-memory-format "x"))
 (signed menu-item "Signed Decimal" gdb-memory-format-signed :button
	 (:radio equal gdb-memory-format "d"))
 (unsigned menu-item "Unsigned Decimal" gdb-memory-format-unsigned :button
	   (:radio equal gdb-memory-format "u"))
 (octal menu-item "Octal" gdb-memory-format-octal :button
	(:radio equal gdb-memory-format "o"))
 (binary menu-item "Binary" gdb-memory-format-binary :button
	 (:radio equal gdb-memory-format "t"))
 "Format")