The Visibility switch is meant to be used only temporarily. You only need to turn it on for the initial setup of a connection to a Bluetooth device. After the connection has been established, turn o the switch.
4. On the device you want to connect, turn on Bluetooth connectivity and visibility, too.
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5. If the desired device has been found and is shown in the list, click it to establish a connection to it.
You will be asked whether the PINs of the two devices match.
6. If the PINs match, conrm this on both your computer and the device.
Both are now paired. On your computer, the device in the list is shown as Connected.
Depending on the device type, you can now either see it as a storage device in GNOME Files, set a volume for it in the Sound settings or other things.
To connect to a paired Bluetooth device, select the device in the list. In the dialog that appears, turn the Connection switch on. You can send les to the connected device by using the Send Files button. If you are connected to a device such as a mobile phone, you can use it as a network device by activating the appropriate option.
To remove a connected device from the list on your computer, click Remove Device and conrm your choice. To completely remove the pairing, you also need to do so on your device.
3.3.2 Configuring Power Settings
1. Click Applications System Tools Settings Power to open the Power settings module.
2. In the upper part of the dialog, you can see the current state of the battery.
3. In the Power Saving section of the dialog, set the Screen Brightness to conserve power. You can also set whether to dim the screen after a period of inactivity and set the time interval.
You can also set whether to turn o wireless networking after the period of inactivity.
4. In the Suspend and Power Button section of the dialog, set the Automatic Suspend. When you click it, a separate dialog opens.
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In it, you can turn on automatic suspending and associated time intervals. If you are using a computer with a battery, you can set these separately for computer running on battery power or plugged in.
You can also set the action performed when the power button is pressed. Choose Hibernate to use a mode where the computer turns o completely but saves your running session to the hard disk. Alternatively, choose Suspend or Nothing.
3.3.3 Modifying Keyboard Shortcuts
To modify keyboard shortcuts click Applications System Tools Settings Keyboard.
FIGURE 3.2: KEYBOARD DIALOG
The Keyboard dialog shows the keyboard shortcuts that are congured for your system. Click the categories on the right to view the current shortcuts.
To edit a key combination, rst click the row. To set a new key combination, press the keys.
To disable a shortcut, press <— instead.
To congure keyboard accessibility options, refer to Section 4.4, “Mobility Impairments”. To congure your keyboard layout, refer to Section 3.2.2, “Configuring Language Settings”.
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3.3.4 Configuring the Mouse and Touchpad
To modify mouse and touchpad options, click Applications System Tools Settings Mouse and Touchpad.
FIGURE 3.3: MOUSE AND TOUCHPAD SETTINGS DIALOG
In the General section of the dialog, you can set the Primary button orientation (left or right).
In the Mouse section of the dialog, use Mouse Speed to adjust the sensitivity of the mouse pointer.
In the Touchpad section of the dialog, you can turn the touchpad on and o. Use Touchpad Speed to adjust the sensitivity of the touchpad pointer. You can also disable the touchpad while typing and enable clicks by tapping the touchpad.
To test your settings, click Test Your Settings and try the pointing device.
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For conguration of mouse accessibility options, refer to the Section 4.4, “Mobility Impairments”.
3.3.5 Installing and Configuring Printers
The Printers module lets you connect to any available local or remote CUPS server and congure printers.
To start the Printers module, click Applications System Tools Settings Printers. For detailed information, refer to Chapter 6, Managing Printers.
3.3.6 Configuring Screens
To specify resolution and orientation for your screen or to congure multiple screens, click Applications System Tools Settings Displays.
PROCEDURE 3.1: CHANGING THE SETTINGS FOR A MONITOR
1. To nd the right monitor, look for the numbers displayed in the upper left corner of all monitors after you have opened the Display dialog. To set options for a monitor, click the list item of the monitor. A new dialog appears.
2. If multiple monitors are attached to the computer, the left part of the dialog will allow you to choose how to use the monitor. You can choose between:
Primary
The screen that shows the panel and important messages.
Secondary Display
A monitor that expands the desktop of the primary monitor.
Mirror
A monitor that mirrors the image on the primary monitor. In terms of resolution, the lowest common denominator will be used.
Turn O
A screen that is not used.
To rotate the displayed image, use the buttons with the arrows pointing left and right. To mirror the displayed image, use the button with the double arrow icon.
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You can set a dierent resolution by changing the value next to Resolution. Not all resolutions provide a sharp and unstretched image. To nd the best resolution for your monitor, refer to its manual.
3. When you are done, click Apply.
The monitors will now readjust. This can take multiple seconds during which the screen can be black or distorted.
Afterward, a conrmation dialog will appear.
4. If the conguration looks correct, click Keep Changes.
If the conguration is not what you hoped for, click Revert Settings or wait for 20 seconds.
The changes will then be reverted.
FIGURE 3.4: MONITOR RESOLUTION SETTINGS DIALOG
PROCEDURE 3.2: CHANGING THE ARRANGEMENT OF MULTIPLE MONITORS
If you are using multiple screens, set up how they are arranged, so you can use the mouse pointer properly across monitors.
1. Click Arrange Combined Displays.
2. To nd the right monitor, look for the numbers displayed in the upper left corner of all monitors. Click and drag the monitor image around to move it.
3. When you are done, click Apply.
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4. If the conguration looks correct, click Keep Changes.
If the conguration is not what you hoped for, click Revert Settings or wait for 20 seconds.
The changes will then be reverted.
3.3.7 Configuring Sound Settings
The Sound tool lets you manage sound devices and set the sound eects. In the top part of the dialog, you can select the general output volume or turn the sound o completely.
To open the sound settings, click Applications System Tools Settings Sound.
FIGURE 3.5: CONFIGURING SOUND SETTINGS
3.3.7.1 Configuring Sound Devices
Use the Output tab to select the device for sound output. Below the list, choose the sound device setting you prefer, for example balance.
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Use the Input tab to set the input device volume or to mute the input temporarily. If you have more than one sound device, you can also select a default device for audio input in the Choose a device for sound input list.
3.3.7.2 Configuring Sound Eects
Use the Sound Eects tab to congure whether and how you want sound to be played when message boxes appear.
Specify the volume at which the sound eects will be played under Alert volume. You can also turn the eects on and o.
Select the Alert Sound to use.
3.3.8 Networking
To set up networking options, click Applications System Tools Settings Network.
In the appearing dialog, you can congure wired or wireless connections and proxies and VPNs.
To learn more about setting up network connections, see Book “Administration Guide”, Chapter 37
“Using NetworkManager”.
3.4 System
In the following sections, you will nd examples of how to congure some system aspects of your GNOME desktop. These include preferred applications, changing your user password, and session sharing preferences.
To learn more about conguring assistive technologies, see Chapter 4, Assistive Technologies.
3.4.1 Changing Your Password
For security reasons, it is a good idea to change your login password from time to time. To change your password:
1. Click Applications System Tools Settings Users.
2. Click the button labeled with dots next to Password.
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3. In the rst text box, type your current password.
4. In the next text box, type a new password.
You can also click the cog wheel icon at the end of the text box to generate a random password.
5. Conrm your new password by typing it again in the last text box.
6. Click Change.
3.4.2 Setting Preferred Applications
1. To change the default application for various common tasks such as browsing the Internet, sending mails or playing multimedia les, click Applications System Tools Settings Details.
FIGURE 3.6: PREFERRED APPLICATIONS 2. Click Default Applications.
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3. Select one of the available applications from the drop-down box. You can choose an application to handle Web, mail, calendar, music, videos or photographs.
3.4.3 Setting Session Sharing Preferences
To open a conguration dialog for sharing a GNOME desktop session between multiple users and set session-sharing preferences, click Applications System Tools Settings Sharing.