Raymarine GPM400 Reference Manual page 96

For each preset (and for each frequency within the preset), you can
change the following display mode settings:
• Zoom
• Bottom Lock
• A-Scope
To change the settings for a preset
1. Press the ADJUST <preset name> softkey.
2. Select F1 or F2.
3. Select the mode you want to adjust.
4. Make changes using the trackpad or rotary controller.
5. Press OK when complete.
Zoom
If necessary you can zoom in on the bottom to display more detail.
This zoom option lets you:
• Replace the standard fishfinder image with the zoomed image,
or display the zoomed image alongside the standard fishfinder
image.
• Set the zoom factor to a pre-defined level, or adjust it manually.
• Reposition the zoomed portion of the image to a different point
in the display.
When the range increases, the area shown in the zoom window
also increases.
Full or split screen
You can either replace the standard fishfinder image with the
zoomed image or split the screen and display the zoomed image
alongside the standard fishfinder image (ZOOM SPLIT). The
zoomed section is indicated on the standard fishfinder screen by a
zoom box (see illustration below).
G-Series Reference Manual
Zoom pane
To select split-screen or full-screen
1. Select FULL or SPLIT with the ZOOM softkey.
When the zoom function is active (ZOOM FULL or ZOOM SPLIT),
you can either select a predefined zoom factor or adjust it manually.
To select the zoom factor
1. Press the ZOOM softkey.
2. On the ZOOM FACTOR key, toggle between pre-defined
settings or select xR to set a factor manually. For manual
settings, adjust the zoom factor with the rotary controller.
3. Press OK to accept your setting.
96
Standard pane