Translations by Aputsiak Niels Janussen

If you do not have Flash installed, you will probably see a message telling you so when you visit a website that needs it. Flash is available as a free (but not open-source) download for most web browsers.

<link xref="about-this-guide">Tips on using this guide</link>, <link xref="community-support">get help from community</link>, <link xref="get-involved">help improve this guide</link>…

Adobe has announced that they will stop updating and distributing the Flash Player at the end of 2020. Consequently, for security reasons, the Flash plug-in should not be used after 2020.

<em>NPAPI</em> for <app>Firefox</app> and other Gecko-based web browsers

Flash is a <em>plug-in</em> for your web browser that allows you to watch videos and use interactive web pages on some websites. While HTML5, which is a more modern solution, is increasingly offered, there are still some websites which won't work without Flash.

You may need to install Flash to be able to view some websites, which display videos and interactive web pages.

To add a contact:

Press <gui style="button">New</gui>.

Add or remove a contact

This is what the user sees when printing on a typical inkjet printer

Notice how the white is not 'paper white' and the black of the eye is now a muddy brown.

Color management is the process of capturing a color using an input device, displaying it on a screen, and printing it all whilst managing the exact colors and the range of colors on each medium.

Displays typically over-saturate the blue channel, making the images look cold.

A bird on a frosty wall as seen on the camera view-finder

The need for color management is probably explained best with a photograph of a bird on a frosty day in winter.

external ref='figures/color-average.png' md5='9189963fdd14f11f0685a9ef2196279b'

Photos from a digital camera stored on a memory card

Most color profiles are in the form of an ICC profile, which is a small file with a <input>.ICC</input> or <input>.ICM</input> file extension.

A color profile is a simple file that expresses a color space or device response.

A virtual device is a color managed device that is not connected to the computer. Examples of this might be:

How do I test if color management is working correctly?

The effects of a color profile are sometimes subtle and it may be hard to see if anything much has changed.

In GNOME we ship several profiles for testing that make it very clear when the profiles are being applied:

<em>Bluish Test</em>: This will turn the screen blue and tests if the calibration curves are being sent to the display

<em>ADOBEGAMMA-test</em>: This will turn the screen pink and tests different features of a screen profile

A virtual device is a color managed device that is not connected to the computer.

What's a virtual color managed device?

Getting a profile from the monitor vendor or creating a profile yourself would lead to more accurate color correction.

<link xref="color-whyimportant">Why is this important</link>, <link xref="color#profiles">Color profiles</link>, <link xref="color#calibration">How to calibrate a device</link>…

Color profiles

Testing color management isn't hard, and we even supply some test profiles.

Default monitor profiles do not have a calibration date.

Why don't the default monitor profiles have a calibration expiry?

The default color profile used for each monitor is generated automatically based on the display EDID which is stored in a memory chip inside the monitor. The EDID only gives us a snapshot of the available colors the monitor was capable of displaying when it was manufactured, and does not contain much other information for color correction.

Settings for important parts of the system aren't stored in your Home folder. There are a number of locations that they could be stored, but most are stored in the <file>/etc</file> folder. In general, you won't need to back up these files on a home computer. If you are running a server, however, you should back up the files for the services that it is running.

Any file or folder name that starts with a period (.) is hidden by default. To view hidden files, click <guiseq><gui>View</gui><gui>Show Hidden Files</gui></guiseq> or press <keyseq><key>Ctrl</key><key>H</key></keyseq>. You can copy these to a backup location like any other file.

Any files in the Trash folder. Your Trash folder can be found in <file>~/.local/share/Trash</file>.

Files that are already backed up somewhere else, such as to a CD, DVD, or other removable media.

Connect to the Internet using a <link xref="net-wireless-connect">wireless</link> or <link xref="net-wired-connect">wired connection</link>.

Adjust the <gui>Delay</gui> setting to change how long you have to hold the mouse pointer still before clicking.

Turn on <em>slow keys</em> if you would like there to be a delay between pressing a key and that letter being displayed on the screen. This means that you have to hold down each key you want to type for a little while before it appears. Use slow keys if you accidentally press several keys at a time when you type, or if you find it difficult to press the right key on the keyboard first time.

You can right-click by holding down the left mouse button. This is useful if you find it difficult to move your fingers individually on one hand, or if your pointing device only has a single button.

Adjust the <gui>Delay</gui> setting to change how long you have to hold the mouse pointer still before clicking.

Click the icon at the far right of the menu bar and select <gui>System Settings</gui>.

You can click or drag simply by hovering your mouse pointer over a control or object on the screen. This is useful if you find it difficult to move the mouse and click at the same time. This feature is called Hover Click or Dwell Click.

When Hover Click is enabled, you can move your mouse pointer over a control, let go of the mouse, and then wait for a while before the button will be clicked for you.

Open <gui>Universal Access</gui> and select the <gui>Typing</gui> tab.

Click the icon at the very right of the <gui>menu bar</gui> and select <gui>System Settings</gui>.

How often and by how much the data on the computer changes.