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{{ :xfce:xfce4-settings.accessibility.png?nolink|}}
====== xfce4-settings - Accessibility ======
* **[[#Assistive Technologies|Assistive Technologies]]**
* **[[#Keyboard|Keyboard]]**
* **[[#Sticky Keys|Sticky Keys]]**
* **[[#Slow Keys|Slow Keys]]**
* **[[#Bounce Keys|Bounce Keys]]**
* **[[#Mouse|Mouse]]**
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===== Assistive Technologies =====
Xfce provides several customisable keyboard and mouse accessibility options.
? Enable Assistive Technologies
! When {gui>Assistive Technologies} is enabled, the Xfce desktop is enabled, xfce4-session will load the required modules so the toolkit (Gtk) can communicate with [[http://live.gnome.org/Orca|Orca]], the suite of utilities for the visually impaired.
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===== Keyboard =====
These settings are here to help people with certain disabilities get the most out of their keyboards.
=== Sticky Keys ===
When Sticky Keys are active, you can press key combinations in sequence instead of at the same time. For instance,
{key>Ctrl} followed by {key>C} (instead of {key>Ctrl-C}) will copy selected text.
=== Slow Keys ===
When Slow Keys are active, the keyboard won't register a keystroke until you hold the key down for a certain length of time. The default time is 500 milliseconds, or half a second. You can move the slider with the mouse to adjust the length of time.
=== Bounce Keys ===
When Bounce Keys are active, the keyboard won't accept a keystroke until there has been a certain interval of time since the previous keystroke. The default interval is 500 milliseconds. You can move the slider with the mouse to adjust the length of time.
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===== Mouse =====
Mouse Emulation lets you move the mouse pointer with the arrow keys on the numeric keypad. As seen in the above screenshot, the values that can be set are:
* Acceleration delay (in milliseconds)
* Repeat interval (in milliseconds)
* Acceleration time (in milliseconds)
* Maximum speed (in pixels per second)
* Acceleration profile
(Acceleration profiles are mathematical formulas. [[http://www.x.org/wiki/Development/Documentation/PointerAcceleration#Acceleration_profiles_.28for_the_inclined_programmer.29|The X.org wiki]] says: "Acceleration profiles translate device velocity into an acceleration to be imposed on the pointer.")
The Mouse Emulation module is included primarily to help people who cannot use a standard mouse. There are no optimal settings; you will need to experiment to find which settings work the best for you.
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