Raymarine GPM400 Reference Manual page 82

Exaggeration
Sometimes it is easier to see certain topographical features if they
are exaggerated. Adjusting the exaggeration has the effect of verti-
cally stretching objects on the chart, making it easier to see their
shape and position. This could be particularly helpful if you are fish-
ing, for example.
Exaggeration factor x1
To adjust exaggeration
1. Press the PRESENTATION softkey.
2. Press the 3D VIEW OPTIONS softkey.
3. Press ADJUST EXAGGERATION.
4. Use the rotary controller to set your level of exaggeration.
5. Press OK.
Press CANCEL at any time to return to the previous exaggeration
setting.
Declutter
In some circumstances, the quantity of information displayed on the
chart can render its interpretation difficult.
G-Series Reference Manual
The declutter feature removes some chart objects from view to
make the chart clearer to read and navigation simpler.
To turn declutter on or off
1. Press the PRESENTATION softkey.
2. Toggle to ON or OFF using the DECLUTTER softkey.
Exaggeration factor x50
82
Declutter OFF Declutter ON