Juniper Allegro CE Owner's Manual page 101

When calibrating the touchscreen, hold the stylus down on the plus
mark (+) for two seconds. Complete this procedure for each + mark
shown on the touchscreen. Press Enter when prompted.
System
The System Properties applet displays general information about the
hardware and software configurations for your Allegro. The General
tab gives you system information including the processor type, etc.
Windows CE Page 4-41