The application keypad keys are not available

The ONLINE menus rely on the application keypad: PF1 - PF4, KP0 - KP9, etc. The problem occurs, if these keys do not trigger the expected events but print the numbers that are written on their faces.

User action: Use the terminal emulator xterm. Clicking Ctrl-left-mouse-button into the xterm raises the first menu, enable 'Old Function-Keys'. The Ctrl-middle-mouse-button invokes the second menu, select 'Enable Application Keypad'.

The options can be defined permanently by inserting the following lines into ~/.Xdefaults:

XTerm*appkeypadDefault:         true
XTerm*oldXtermFKeys:            true

If the above actions are not sufficient: Use kbdr to ensure that the X server has the correct translation table, PF1 has to be mapped to KP_F1, KP1 to KP_1, etc. Fix it, if necessary.