Mike
McBride
26/01/2001
1.00.00
KDE
KControl
accessibility

# Accessibility

## Introduction

This module is designed to help users who have difficulty hearing audible cues, or who have difficulty using a keyboard or mouse.

The module is divided into three tabs: Bell, Keyboard, Mouse.

### Bell

This panel is divided into an Audio Bell section and a Visual Bell Section.

The top check box labelled System Bell, determines whether the normal System bell rings. If this option is disabled, the System bell will be silenced.

The next check box down can be used to play a different sound whenever the system bell is triggered. To activate, place a mark in the check box labelled Use customized bell, and enter the complete pathname to the sound file in the blank labelled Sound to Play. If you want, you can select the Browse button to navigate through your filesystem to find the exact file.

For those users who have difficulty hearing the System bell, or those users who have a silent computer, &kde; offers the Visual bell. This "bell" can be configured to invert the screen, or to flash a color across the screen.

To use the visual bell, first place a mark in the check box labeled Use visible bell.

You can then select between Invert Screen, or Flash screen. If you select Invert screen, all colors on the screen will be reversed. If you choose Flash color, you can choose the color by pressing the button to the right of the Flash Screen selction.

The slider bar can be used to adjust the duration of the visual bell.

### Keyboard

There are three sections to this panel.

Sticky Keys

  If this option is enabled, the user can press and release the Shift, Alt or Control keys, and then press another key to get a key combo (example: Ctrl Alt Del could be done with Ctrl then Alt then Del).

  Also in this section is a checkbox labeled Lock Sticky Keys. If this checkbox is enabled, then the Alt, Ctrl, and Shift keys stay selected until they are de-selected by the user.

  As an example:

  With Lock Sticky Keys disabled- The user types the Shift key, then press the F key. The computer translates this into Shift F. Now if the user types a p, the computer interprets this as the letter p (no shift).

  With Lock Sticky Keys enabled - The user types the Shift key, then press the F key. The computer translates this into Shift F. Now if the user types a p, the computer interprets this as the letter Shift P.

Slow keys

  If this option is enabled, the user must hold the key down for a specified period of time (adjustable with the slider) before the keystroke will be accepted). This helps prevent accidental keypresses.

Bounce keys

  If this option is enabled, the user must wait a specified delay (configurable with the slider), before the next key press can be accepted. This prevents multiple key strokes from people with tremors.

### Mouse Navigation

Keyboard navigation helps people who have difficulty with trackballs, digital tablets and mice. These users can now configure KDE to use the arrow keys on the numeric keypad as a replacement.

To enable this option, place a mark in the check box labeled Move mouse with keyboard.

You can use the 5 sliders to adjust the Acceleration delay, Repeat interval, Acceleration time, Maximum speed and Acceleration profile to your comfort.

## Section Author

This section written by Mike McBride mpmcbride7@yahoo.com