When using the TI-84 Plus calculator, especially when you first start using it, you are going to make errors or press the wrong keys. The TI-84 Plus calculator offers four ways to edit an entry:

  • Deleting the entire entry:

    Use the


    to place the cursor anywhere in the entry and then press [CLEAR] to delete the entry.

  • Erasing part of an entry:

    To erase a single character, use the


    to place the cursor on the character you want to delete and then press [DEL] to delete that character.

  • Inserting characters:

    Because “typing over” is the default mode, to insert characters you must first press [2nd][DEL] to enter Insert mode. When you insert characters, the inserted characters are placed to the left of the cursor. For example, if you want to insert CD between B and E in the word ABEF, you would place the cursor on E to make the insertion.

    To insert characters, use the


    to place the cursor at the location of the desired insertion, press [2nd][DEL], and then key in the characters you want to insert. Notice, the cursor does not blink with the typical black square you’re used to seeing; instead, it blinks with an underscore. When you’re finished inserting characters, press one of the arrow keys to take the calculator out of Insert mode.

  • Keying over existing characters:

    “Type over” is the default mode of the calculator. So if you want to overtype existing characters, just use the


    to put the cursor where you want to start, and then use the keyboard to enter new characters.