Style of Routes

Does anyone know if its possible to change the style used for the current route directions on a Garmin Say Nav. The thick pink line, tends to mask everything underneath.
I cannot find anything in the TYP file.

I have a feeling this is “the Garmin way” and that there’s nothing that can be done to change it. Users of various Garmin devices all report a purple/pink line, e.g.

For a Nav I don’t know, but on a etrex legend hcx, you can choose the color (but not the thickness) through the Stepup menu > Routing > Routing color setup. If you choose a blank line, it will be still visible on the yellow background (at least when the backlight is on), but less masking streets etc.