Eagle Electronics fishelite, seacharter 480, 480df ユーザーズマニュアル

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Track Smoothing option, turned on.
Trail Options
There are several options you can use with trails. Some affect all trails,
other options can be applied to a particular trail. You can change the
way trails are updated, display or hide trails, make them flash on the
screen or not flash, create a new trail, delete a trail, etc.
General Trail Options
To access the Trails Menu:
1. Press 
MENU
|
MENU
|
↓ to 
M
T
RAILS
|
ENT
.
 
 
Main Menu, left, Trails Menu, center, Trail Options, right.
Delete All Trails
To remove all of the trails from memory: from the Trails Menu, press 
to 
D
ELETE 
A
LL
|
ENT
|
← to 
Y
ES
|
ENT
.
Flash Trails on Screen Option
From the Trails Menu, press 
→ to 
T
RAIL 
O
PTIONS
|
ENT
|
↓ to 
F
LASH 
T
RAILS
.
With the option highlighted, press 
ENT
 to check it (turn on) and un-
check it (turn off.)
Update Trail Option
This menu lets you change the way the trail updates occur.