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Oracle recommends that you upgrade the software described by this documentation as soon as possible.
You can customize keyboard preferences and enable various features for accessibility in the GNOME desktop by using the Assistive Technologies Preferences tool.
To customize keyboard preferences from the top bar of the GNOME desktop:
Starting from the System menu, select Preferences, and then select Assistive Technologies to open the Assistive Technologies Preferences tool.
Click Keyboard Accessibility to open the Keyboard Preferences tool.
Using the accessibility tabbed section of the Keyboard Preferences tool, set the following keyboard preferences:
Accessibility features can be toggled with keyboard shortcuts: Provides the ability to set preferences for using the keyboard to toggle accessibility features. To enable this feature, select the check box.
Sticky Keys: Enables a sequence of keys to be treated as keyboard combinations. The following preferences are available: Simulate simultaneous keypresses and Disable sticky keys if two keys are pressed together (default). To enable or disable either preference, select or deselect the associated check box. You can enable these preferences individually or in combination with one another.
Slow Keys: Inserts a delay between the time a key is pressed and the time it is accepted. To enable this feature, select the Only accept long keypresses check box. You can specify a length of time for the delay (ranging from Short to Long) by adjusting the Slow-keys slider.
Bounce Keys: Ignores fast or duplicate key presses. You can specify a length of time for the delay (ranging from Short to Long) by adjusting the Bounce-keys slider.
Audio Feedback...: Provides the option to set audio feedback preferences, as well as visual cues.
Click Audio Feedback to open the Keyboard Accessibility Audio Feedback group, where you can set the following preferences:
General: You can set the following two preferences:
Beep when accessibility features are turned on or off
Beep when a toggle key is pressed
You can set these preferences individually or in combination with one another by selecting the associated check box.
Sticky Keys: Provides the option to set the following preference: Beep when a modifier key is pressed. To set the preference, select the check box.
Visual cues for sounds: Provides the option to set the following preference: Show visual feedback for the alert sound. To set the preference, select the check box.
When this preference is selected, you can enable either of the following options: Flash window titlebar or Flash entire screen (default).
Click Close to save the changes, exit the Keyboard Accessibility Audio Feedback group, and return to the Keyboard Preferences tool.
(Optional) To test that the preferences you selected work as expected, type a sample text string into the Type to test settings: field.
When you are done making changes, close the Keyboard Preferences tool.
Continue configuring preferences by using the Assistive Technologies Preferences tool, or click Close to exit the tool.