HP 48gII User Manual page 801

If you press the OK soft menu key (), then the _Complex option is forced, and
the result is the following:
The keystrokes used above are the following:
R„Ü5„Q2+ 8„Q2`
When asked to change to COMPLEX mode, use:F. If you decide not to
accept the change to COMPLEX mode, you get the following error message:
Verbose vs. non-verbose CAS mode
When the _Verbose CAS option is selected, certain calculus applications are
provided with comment lines in the main display. If the _Verbose CAS option
is not selected, then those calculus applications will show no comment lines.
The comment lines will appear momentarily in the top lines of the display
while the operation is being calculated.
Step-by-step CAS mode
When the _Step/step CAS option is selected, certain operations will be
shown step at a time in the display. If the _Step/step CAS option is not
selected, then intermediate steps will not be shown.
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