This check box toggles whether or not Orca will make use of a braille display. If BrlTTY is not running, Orca will recover gracefully and will not communicate with the braille display.
Default value: not checked
If you configure BrlTTY later on, you need to restart Orca in order to use braille.
Orca's braille monitor provides an on-screen representation of what takes place on the braille display. This feature is mostly for demonstration purposes, but is also useful for Orca developers who do not have access to a braille display.
Default value: not checked
Orca supports contracted braille via the liblouis project. Because many distros include liblouis, you will likely automatically have access to contracted braille support in Orca.
To enable contracted braille on a system where liblouis has been installed, be sure that the Enable Contraced Braille checkbox is checked. Then choose your desired translation table from the Contraction Table combo box.
Default value: not checked
This check box determines the manner in which role names are displayed and can be used to help conserve real estate on the braille display. For instance, if a slider had focus, the word "slider" would be displayed if abbreviated role names is not checked; if it were checked, "sldr" would be displayed instead.
Default value: not checked
Checking this checkbox tells Orca to not present the "$l" string at the end of a line of text.
Default value: not checked
This radio button group determines the amount of information that will be brailled in certain situations. For example, if it is set to verbose, keyboard shortcut and role name information is displayed. This information is not displayed in brief mode.
Default value: Verbose
The Selection Indicator and Hyperlink Indicator radio button groups allow you to configure Orca's behavior when displaying selected text and hyperlinks. By default, when you encounter either, Orca will "underline" that text on your braille display with Dots 7 and 8. If you would prefer, you can change the indicator to only be Dot 7, only be Dot 8, or not be present at all.
Default value: Dots 7 and 8
You can also optionally have text attributes indicated in braille. Enabling this feature and choosing which attributes are of interest is done on the Text Attributes page of the preferences dialog.