Subaru 2002 Legacy Owner's Manual page 155

B Compass mirror (if equipped)
HB6019BB
The inside electronic compass mirror has an anti-glare feature which
automatically reduces glare coming from headlights of vehicles be-
hind you. It also contains a built-in compass.
D By pressing and releasing the left button, the automatic dimming
function is toggled on or off. When the automatic dimming function is
on, the auto dimming indicator light (green) located to the right of the
button will illuminate.
D By pressing and releasing the right button, the compass display is
toggled on or off. When the compass is on, an illuminated compass
reading will appear in the lower part of the mirror.
Even with the mirror in anti-glare mode, the mirror surface turns bright
if the transmission is shifted into reverse. This is to ensure good rear-
ward visibility during reversing.
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