This article mentions some details about Orca (GNOME-ORCA) in Debian. Orca is the graphical screen reader for the GNOME environment.
If you have enabled accessibility during the Debian installation and also installed a desktop system, accessibility is enabled by default and you only have to install Orca.
Installation and configuration on a usual Debian system
If you installed Debian without accessibility features, you should do the following steps:
sudo aptitude install gnome-orca (you can also install gnome-mag, if you need also magnification)
Type as the user orca -t
- Answer all questions. After this, Orca will automatically start at user session start.
If it doesn't, see the main accessibility page.
The configuration of Orca (with the option -t) doesn't ask whether Orca should use the magnification. For this you have to open the Orca preferences (Orca key +Space), go to the tab magnification and activate the magnification.
Using Orca (applications)
A list of supported applications can be found at http://live.gnome.org/Orca/AccessibleApps.
Orca currently mainly supports Firefox (iceweasel) to access web pages. You can use text browsers in the terminal as well, but they have obviously less comfort.
The only difference on Debian is that you need to use Iceweasel instead of Firefox. The standard GNOME web browser Ephany is not accessible.
Other speech synthesizers
Please see the main accessibility page, where GNOME-speech and speech-dispatcher are discussed.
Newer, experimental versions of Orca
If you don't want to compile Orca from source but still try a newer version (at your own risk), you can use the version from experimental. For this, you have to configure apt-pinning. Add a experimental-source of Debian, update your package lists and run
sudo aptitude -t experimental install gnome-orca
WARNING: Experimental really means experimental.
NOTE: You might have to reconfigure Orca, since a new mechanism for the configuration handling was introduced in Orca.
NOTE: It is possible, that after this the gdm greeter is not any longer able to start Orca at the login screen.