Need to see Nodes easier

I have been tracing a old medieval plan, using bezier tool and reshaping the lines with the shaper tool.  The original document is very old, so I have scanned in and am using it as a separate layer to trace over.  But it is difficult to see the arrows and lines (handles) that come out of the nodes.  Is there a way of changing the colour of these and perhaps thickness so they are more visible?