HP 850 - Manual (Page 20)

Chapter 1: Getting started 20
Your camera also has a fourth menu, the Setup menu, which
allows you to adjust a number of camera settings. For
information on using the Setup menu, see Chapter 6: Adjusting
the camera settings on page 63.
Restoring previous settings
Some of the settings that you can change in the camera menus
do not remain set after you turn the camera off. However, you
can restore the settings from the last time the camera was on
and had at least one non-default setting (which could actually
be several power cycles ago) by holding down the blue Menu/
OK button while rotating the OFF/Mode selector to turn the
camera on.