1) Turn the Ti-Nspire off. ‘
2) Next, Press [DOC][EE][ENTER]. Hold the 3 keys & press the reset button on the back using a pen or pencil.
To enter π, type pi.
To enter θ, type theta.
To enter ∞: type infinity.
To enter ≤, type <=. To enter ≥, type >=.
To enter √, type sqrt(…).
To enter ǁ, type abs(…).
To enter i (the imaginary constant), type @i.
To enter e (natural log base e), type @e.
To enter ° (degrees), type @d.
To enter r (radians), type @r.
Access the Documents menu: Doc
Access the Context menu (right-click): Ctrl-Menu
Open Document: Ctrl-O
Close Document: Ctrl-W
Create New Document: Ctrl-N
Insert New Page: Ctrl-I
Select Application: Ctrl-K
Save Current Document: Ctrl-S
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Display previous page: Ctrl-◄
Display next page: Ctrl-►
Switch between applications on a split page: Ctrl-Tab
Display page sorter view: Ctrl-▲
Move through the fields in a dialog box: Tab
Move through the fields in reverse order: Shift-Tab
Increase contrast: Ctrl-+
Decrease contrast: Ctrl-–
Power off: Ctrl-On