Texas Instruments Derive 5 Introduction Manual page 9

4 Chapter 1: First Steps
Work with D by entering expressions and applying commands, thus creating a worksheet.
ERIVE
After starting D , the system is ready to accept user input via the Expression Entry Toolbar,
ERIVE
as is indicated by the blinking cursor in the toolbar's entry field. Input mode can be implemented
with the Command Toolbar's tenth button from the left, labeled .
Learn more about the button
by moving the mouse pointer onto it.
The message Author Expression below the cursor is the button's title. The Status Bar message
sheet is the button's function description.
Enter new expression in active work
Prepare for entering an expression: Move the mouse pointer onto
, then click (i.e. press
and release) the left mouse button.
Enter the fraction: 2/3
End the input with the 'Enter'-key (¢).
D displays this expression as a fraction with a horizontal line, a numerator, and a
ERIVE
denominator, i.e. in "2-dimensional" output format, as opposed to the "1-dimensional" or "linear"
input format used for entering the number. The expression's unique label number, #1, is shown
to the left of the expression. D is again ready to accept the next input, i.e. input control (the
ERIVE
focus) is still in the entry line. Also observe that a copy of the input is still in the entry field and is
entirely highlighted. This has the same meaning as in text editors and word processors. You can
remove the highlighting with the right arrow key, then edit the string of symbols, or you can
replace the marked string by typing new symbols.