This function will create a numbered base node and relabel the node to reflect this action.
This function also be called by placing the mouse cursor over the node and pressing the F2 function key on your keyboard.
If you create a base node and then decide that you'd like it to be an asserted molecular node instead, delete the node and redraw it instead of calling on it. Should you do the latter, the displayed node will ``look'' asserted, but internally will still be marked as a base node and cause problems.