JDC Electronic SA Geos 11 - Manual (Page 20)

To display the special menu, press and hold simultaneously the and
buttons, flashes on the upper block. When stops flashing,
release the buttons. The special menu features 10 screens (7 screens for
special modes and 3 screens for the memories):
Navigate (switch from one screen to another) in the special menu with
the help of the
button. To exit the menu, keep pressing the button
for 2 seconds.
Enabling a Special Mode
In an effort to simplify the use of the instrument as much as possible, the
special modes are only displayed if they are so enabled beforehand; this
avoids overloading the screens with data for which some users may have
no use.
To enable/disable one or several special mode(s), enter the special menu
and display the screen of the desired special mode; then, using the
button, select to enable or to disable the mode. Confirm your
choice and exit the special menu by pressing the button for 2 seconds.
Once activated, a special mode is displayed on a ‘separate’ special
screen. In order to access a special mode that has been enabled, you only
need to press briefly the
button from the standard screen.
To find out more on the display and use of a special mode once it has
been enabled, please refer to the following sections
20