track centerline opacity

How do I lighten or even remove the dark centerline that runs horizontal thru each track display? I am using current Audacity 2. and run Win7 64/SP1. Sometimes while looking for spikes at ‘sample’ level it will obscure the data points and there connecting lines.

Are you displaying “Waveform” or “Waveform dB”? Have you tried resizing your track vertically? Have you tried zooming in - to stretch the waveform out more?