Someone may know what I've inadvertently done and how to correct it.
Due to some accidental keyboard pressing, my mouse pointer has changed to a vertical & horizontal cross hair type arrangement whilst I'm in schematic diagram mode. As soon as the mouse is moved away i.e. towards the menu's it reverts back to a mouse pointer.
Goodness knows what I've done but no matter how much I try things, I cannot get the mouse pointer back.