Juniper Allegro CE Owner's Manual page 74

Dialing
The Dialing Properties applet is used to create dialing locations and
set dialing options to connect to a service provider or remote
computer.
Display
The Display Properties applet has several tabs controlling different
display features. Each allows you to change different appearance
options of your Windows CE desktop. The Background tab gives you
options for the desktop background image (the default is None).
Page 4-14 Windows CE