A few words of thanks would be greatly appreciated.

Keyboard - The Insert key

On most computer keyboards is a button called Insert (INS).
This key is usually above the arrow keys, and beside the Delete key

Its main use is the switching between two modes of entry of the text insertion and replacement of the text.

Insert mode

By default, Windows uses the insert mode for entering text. Here's how it is:
  • Insert mode, typed characters are inserted at the cursor location.
    • Example (the symbol | point out the cursor):
    • a cha | nge
  • By typing the letters' L ', ' L ' and' E 'it will give:
    • a challe | nge

Replacement Mode

But there is also another way: Replacement Mode
In replacement mode, writing each new character replaces an existing character, the one right next to the cursor.
  • Example (the symbol: | represent the cursor):
    • a cha | nge
  • By typing the letter 'R' it will give:
    •  a char | ge


The word I just type replaces the one I previously typed

The problem is simple: you had unwillingly press the INS key and changed the modes (Insert> replacement).

To return to the proper mode, press the button again and make a test.

A few words of thanks would be greatly appreciated.

Ask a question
CCM is a leading international tech website. Our content is written in collaboration with IT experts, under the direction of Jean-François Pillou, founder of CCM.net. CCM reaches more than 50 million unique visitors per month and is available in 11 languages.


This document, titled « Keyboard - The Insert key », is available under the Creative Commons license. Any copy, reuse, or modification of the content should be sufficiently credited to CCM (ccm.net).