Garmin GPSMAP 135 Sounder - Manual (Page 37)

Sounder Zoom Function
The sounder zoom function allows you to see the current display picture at 2
times (2X) and 4 times (4X) magnification. 2X means that the screen displayed
will now cover 1/2 the depth you were originally viewing in twice the detail and
4X shows 1/4 the original depth at four times the detail. Because less area is being
shown [in a zoom screen] objects can be seen in greater detail.
The sounder zoom function is accessed by using the Z key when viewing the
sounder page.The sounder zoom function is divided into four display levels:
• 2X Split Screen - Shows two reduced-size sonar pictures at the same time. The top
half of the display screen will show the complete sonar picture at its original scale.
The bottom half shows the original picture at 1/2 depth scale.
• 2X Full Screen - Displays the 2X zoomed picture on the full GPSMAP 135 Sounder
screen and does not show the original scale picture.
• 4X Split Screen - Again shows two reduced pictures, with one showing the original
scale and one at 1/4 the original depth scale.
• 4X Full Screen - Displays only the 4X zoomed picture on the full GPSMAP 135
Sounder screen.
Once activated, the zoomed picture replaces the sounder page display. Note:
The zoom function can only be deactivated by using the Z key and scrolling up to
the original picture scale. Q will not turn off the zoom function.
The zoom function operates in either auto zoom or manual zoom. Auto zoom
will follow the bottom contour while manual zoom will display the selected depth.
To activate the sounder zoom function:
1. While viewing the sounder page, press
Z
down once. The 2X split screen will be
displayed.
2. Continue to press
Z
down to advance to further zoom screen levels.
3. To deactivate the zoom function, press
Z
up until the original scale picture
appears.
A. The 2X zoom split screen allows you to view a
smaller portion of the range while continuing to
view the complete range.
B. Use the 2X or 4X full screen zoom when you
want to see the zoomed area displayed on the full
screen.
27
A B
SECTION
3 SOUNDER PAGE
Sounder Zoom
GPS 135 Rev C 8/4/98 4:17 PM Page 27