Raymarine DS400 & DS500 Manual Do Utilizador

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Chapter 4: Menu Operation
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ZOOM...
Zoom enlarges all or part of the scrolling bottom display at x2, x3 or x4 
magnification. You can select automatic zoom so the sounder keeps the 
bottom in the lower portion of the zoom window or manually pick the area to 
be zoomed. The ZOOM sub-menus are:
View
Zoom magnification
Zoom Mode 
View
The View sub-menu determines how the zoomed area appears on the screen.
OFF means the display is not zoomed.
SPLIT means the display is split vertically, with the zoom image in the left 
hand window and the scrolling bottom display in the right hand window. 
See Figure 4-3 .
In a split window display, a zoom box appears, representing the range 
being displayed in the zoom window. The depths of the upper and lower 
boundaries of the zoom box are displayed in the upper and lower right 
corners of the zoom window.
FULL SCREEN zooms the entire screen.
Note:  If also displaying dual frequencies, the zoomed image is displayed ful-
ly in both frequency windows.