The sortwords shown in this window are all the sortwords defined in the sortfile, together with all the system defined sortwords.
Global sortwords have the background of the data value window coloured light green, whilst the un-modifiable event-local sortwords have the background of the data value window coloured light red.
The global sortwords are the only sortwords that it is possible to modify dynamically.
If the sort program is present but is not yet going then the event handler will not have been loaded, and the values shown will be undefined.
Typing a new number and pressing the Return key will cause the sort program to receive the new value immediately.