Using The Arrow Keys; The Busy Indicator - Texas Instruments TI-83 Series Manual

Using the Ñ key
Ñ is the key you use to enter the variable in the definition
of a function, a parametric equation, a polar equation, or a
sequence. In Function mode, this key produces the variable X. In
Parametric mode it produces the variable T; and in Polar and
Sequence modes it produces the variables θ and n, respectively.
Setting the mode is explained later in this chapter.

Using the arrow keys

The arrow keys (~, |, }, and Ü) control the movement of
the cursor. These keys are in a circular pattern in the upper-
right corner of the keyboard. As expected, ~ moves the
cursor to the right, | moves it to the left, and so on. When I
want you to use the arrow keys — but not in any specific
order — I refer to them all together, as in "Use ~|}Ü to
place the cursor on the entry."
What Is the Home Screen?
The Home screen is the screen that appears on the calculator
when you first turn it on. This is the screen where most of the
action takes place as you use the calculator — it's where you
evaluate expressions and execute commands. This is also the
screen you usually return to after you've completed a task
such as entering a matrix in the Matrix editor or entering data
in the Stat List editor.
Press yz to return to the Home screen from any other
screen. This combination of keystrokes, yz, is the equiv-
alent of the Escape key on a computer. It always takes you
back to the Home screen.
If you want to clear the contents of the Home screen, repeat-
edly press ë until the Home screen is blank.

The Busy Indicator

If you see a moving vertical line in the upper-right corner of
the screen, this indicates that the calculator is busy graphing
a function, evaluating an expression, or executing a command.
Chapter 1: Coping with the Basics
9