Juniper Allegro CE Owner's Manual page 173

To view both bars on separate lines again, move the slider down
where the toolbar was originally:
Hiding the Taskbar
You can hide the Taskbar, freeing up room on the display for
applications. To do this, tap the Start button and select Settings|
Taskbar. Under Taskbar options tap the box next to Auto hide.
Press the stylus along the edge to view the Taskbar
When the Taskbar is hidden, you can get it to appear if you press a
stylus along the very bottom of the Allegro screen.
When the Taskbar is hidden you can press the Start button on the
keyboard to bring up the Start menu. Press the Task Manager button
to bring up the Task Manager and move between active applications
and tasks.
Press + for Start menu, for Task Manager
Windows CE Page 4-113