HP 39gs_40gs_Mastering The Graphing Calculator_English_E_F2224-90010

The DEL and CLEAR keys

Another important key is the

DEL key at the top right of the keyboard. This serves as a

backspace key when typing in formulas or calculations, erasing the last character typed.

If you have used the left/right arrow keys to move around within a line of typing, then the

DEL key will delete the character at the cursor position.

The

CLEAR key above DEL can be thought of as a kind of ‘super delete’ key. For example, if pressing DEL

would erase one function only in the

SYMB view then CLEAR will erase the whole set.

Calculator Tip

Another use for the DEL For example,

MODES

then pressi DEL lt of Radians. Pressing

CLEAR in the MODES view would restore factory settings to all the

view.

key is to restore factory settings.

if you move back into the screen and change to Degree mode,

ng the key will restore the defau

entries. This is particularly useful in the

PLOT SETUP

The remaining keys of

LIST, MATRIX, MEMORY, NOTEPAD and PROGRAM have special

chapters of their own.