These utility programs have been designed to appear on the screen at the same time as the program being used to provide an additional or alternative input. For example, a selection of words on the screen can be used alongside a word processor. In addition to using the standard keyboard the user would be able to select words from this list to add to their writing. Words can be chosen using the mouse or, in some cases, selected using switches.

Ready made screen grids can be used or new displays can be created to meet individual needs. One drawback is that part of the screen is used, which can be confusing and reduce the space available for the program being used.
Some of these programs will allow pictures and graphics to be placed on the screen which can send associated words, phrases, pictures or commands to the program being used, for example, a picture of a house could send an address to a word processor.

These programs provide a valuable way of supporting people with SEN and allowing them to use standard software.

For examples of on-screen keyboards see Clicker 5 and Penfriend