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To return to the basic settings using these steps:
Press the H key to see the Calculator Modes screen. Then press the Lkey to see the second page of menu labels at the
bottom of the screen, as in this figure.
Figure 1
Press the A key below the !RESET menu label, press the down arrow key ˜ to choose RESET ALL and then press the F
key below the %OK$ menu label. Then press L again, and press the D key below the $DISP! menu key, press L again,
press !RESET again, select RESET ALL again, and press %OK$ twice. Do this one more time, for the C key below the #CAS$ label.
Finally press %OK$ one last time to say all the changes are OK, and you will get back to the main calculator screen, with the settings
and modes reset to their initial values. If you want to cancel the changes you make, press the Ekey below the !CANCEL menu
label. You can also cancel these changes by pressing the $ key.
If you have created any subdirectories and moved into them, you can press „§one or more times until you get back to your
home directory, when the second line of the display shows {HOME}