1. Click Applications › System Tools › Settings › Background.

2. Click Background or Lock Screen.

3. Click Wallpapers, Pictures, or Colors.

   Wallpapers are preconfigured images distributed with your system. Pictures are your own images from your Pictures directory (~/Pictures). Colors are predefined colors chosen by GNOME developers.

4. Choose an option from the list.

5. When you are satisfied with your choice, click Select.

1. Click Applications › System Tools › Settings › Bluetooth to open the Bluetooth settings module.

2. To use Bluetooth, turn the Bluetooth switch on.

3. To make your computer visible over Bluetooth, turn the Visibility switch on. The computer will start searching for other visible Bluetooth devices in the vicinity and display any found devices in the Devices list. At first, the list may be empty.

   

   Note: Temporary Visibility

   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 off the switch.

4. On the device you want to connect, turn on Bluetooth connectivity and visibility, too.

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, confirm 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.

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 off 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.

   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 off completely but saves your running session to the hard disk. Alternatively, choose Suspend or Nothing.

1. To find 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 Off

   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.

   You can set a different resolution by changing the value next to Resolution. Not all resolutions provide a sharp and unstretched image. To find 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 confirmation dialog will appear.

4. If the configuration looks correct, click Keep Changes.

   If the configuration is not what you hoped for, click Revert Settings or wait for 20 seconds. The changes will then be reverted.

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 find 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.

4. If the configuration looks correct, click Keep Changes.

   If the configuration is not what you hoped for, click Revert Settings or wait for 20 seconds. The changes will then be reverted.

1. Click Applications › System Tools › Settings › Users.

2. Click the button labeled with dots next to Password.

3. In the first 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. Confirm your new password by typing it again in the last text box.

6. Click Change.

1. To change the default application for various common tasks such as browsing the Internet, sending mails or playing multimedia files, click Applications › System Tools › Settings › Details.

   

   Figure 3.6: Preferred Applications #

2. Click Default Applications.

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.