Apple Power Macintosh 5400 series - Manual (Page 34)

To put your computer to sleep right away, choose the Sleep command from
the Special menu, or press the Power key on the keyboard to bring up the
Shutdown dialog box pictured below.
You can set sleep options using the Energy Saver control panel, available
under Control Panels in the Apple (K) menu.
Waking your computer from sleep
To wake the computer from sleep, press any key on the keyboard except Caps
Lock. (It may take a moment or two for the computer to awaken.) The
documents and application programs you had open when the computer went
into sleep are still open and unsaved changes are preserved.
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Click here to set up automatic
startup and shutdown.
Drag the slider to set how long
to wait before sleeping.
Click here to have
the computer shut
down instead of
going to sleep.
Click here to set
separate timing for
monitor sleep.
Click here to set
separate timing for
hard disk sleep.
Click here to put your computer
to sleep now.