[H2bill]

I had a Z1 installed in my '06 H2 and so far I am pleased with it. But I have one question: Is there anyway to dim the screen at night (in map mode)? Driving from San Diego to Oregon the other night, I ended up putting a towel over it so it wouldn't affect my night vision. I looked through the manual and couldn't find anyway to do it. On the Lowrance nav system I have on my motorcycle, there's about five levels of brightness/dimming which really makes it nice for night time operation. Any ideas?