You can navigate the Software Sources using the tabs.
The :guilabel:`Ubuntu Software` tab contains settings involving the downloading of software from Ubuntu repositories. Here you can disable proprietary software and select a download server among other things. To toggle enabling /disabling the proprietary drivers check/uncheck the :guilabel:`Proprietary drivers for devices(restricted)` checkbox. To toggle enabling/disabling other proprietary software check/uncheck the :guilabel:`Software restricted by copyright or legal issues(multiverse)` checkbox. To change the mirror or where you download change the :guilabel:`Download from` drop down menu.
The :guilabel:`Ubuntu Software` tab contains settings involving the downloading of software from Ubuntu repositories. Here you can disable proprietary software and select a download server among other things. To toggle enabling /disabling the proprietary drivers check/uncheck the :guilabel:`Proprietary drivers for devices(restricted)` checkbox. To toggle enabling/disabling other proprietary software check/uncheck the :guilabel:`Software restricted by copyright or legal issues(multiverse)` checkbox. To change the mirror or where you download change the :guilabel:`Download from` drop down menu. The :guilabel:`Main Server` option downloads from the main ubuntu server. There is an :guilabel:`Other` option with a large list of mirrors. The :guilabel:`Mirror` column lists a colapse list of mirrors to download from. To choose the fastest option press the :guilabel:`Select Best Server`.
The :guilabel:`Other software` tab allows you to add, remove or edit other software sources. Here you can manage remote repositories (PPAs) and CD-ROM repositories.To enable/disable a software source click the checkbox to the left of its name. To remove software from the list left cick the :guilabel:`Remove` button.
Updates allows you set which software updates you would like to subscribe to, in this case Security, Recommended, Pre-released (unstable), and Unsupported updates. You can also set how frequently your system will automatically check for updates and what actions it should take, namely notify you, download (without notification), or install updates. You can also specify which releases you would like to be notified of, Normal Releases, Long term releases or Never.
