Toggles between Insert and Overtype mode.

A) ALT+PAGE DOWN
B) ARROW
C) CTRL+HOME
D) HOME
E) CTRL+F
F) END
G) INSERT
H) SHIFT+RIGHT ARROW
I) BACKSPACE
J) SPACEBAR

Overtype Mode

A text input mode in which new characters replace existing characters directly in front of the cursor.

Insert Mode

A mode in text editors where new text entered is inserted at the cursor position, shifting existing text to the right.