The Signal Running Job dialog box is for sending some specified signal to
selected running job(s).

To specify the signal name or number, click on one of the "Send signal"
radio buttons. If the "other" signal is chosen, then type in the signal name
or number on the provided entry box. 

===============
COMMAND BUTTONS
===============
This region of command buttons represents the final step when manipulating this
dialog box. 

Click on "signal" to proceed sending signal to the selected job(s).

Click on "cancel" to cancel the sending of signal to the selected job(s) and
to quit out of this dialog box. This is also the default action when the 
<Return> key is pressed.