Pressing or turns on the corresponding or annunciator symbol at the top of the display. The annunciator remains on until you press the next key. To cancel a shift key (and turn off its annunciator), press the same shift key again.

Alpha KeysLeft-shifted function
Right-shiftedLetter for alphabetic
functionkey

Most keys display a letter in their bottom right corner, as shown above. Whenever you need to type a letter (for example, a variable or a program label), the A..Z annunciator appears in the display, indicating that the alpha keys are “active”.

Variables are covered in chapter 3; labels are covered in chapter 13.

Cursor Keys

Each of the four cursor direction keys is marked with an arrow. In this text we will use the graphics Õ, Ö, × and Øto refer to these keys.