Theme: Signal polygons, ground planes (V19+)
   
   
    The color of the preview of the polygon is a bit light? How can I give it more weight?
   
   
   
The phantom lines of the polygon are drawn in the same color like the crosshairs (F8). In Settings/Settings (INI File) you can set the "Strength of the Crosshair" by a value of  0 - 255. So maybe a higher value can help.