From Fedora Project Wiki
Printing
The print manager (system-config-printer) user interface has been overhauled to look friendlier and be more in line with modern desktop applications. The system-config-printer application no longer needs to be run as the root user.
Other changes include:
- The configuration tool window has been made easier to use. Double-clicking on a printer icon opens a properties dialog window. This replaces the old behavior of a list of printer names on the left and properties for the selected printer on the right.
- The CUPS authentication dialog selects the appropriate user-name and allows it to be altered mid-operation.
- When the configuration tool is running, the list of printers is updated dynamically.
- All jobs queued for a specific printer can be seen by right-clicking on a printer icon and selecting View Print Queue. To see jobs queued on several printers, select the desired printers first before right-clicking. To see all jobs, right-click with no printers selected.
- The job monitoring tool displays a message when a job has failed. If the printer has been stopped as a result, this is shown in the message. A Diagnose button starts the trouble-shooter.
- The job monitoring tool now performs proxy authentication. A submitted job that requires authentication on the CUPS back-end now displays an authentication dialog so the job can proceed.
- The print status dialog (for GTK+) gives more feedback about the status of printers, for example printers that are out of paper show a small warning emblem on their icon. Paused printers also show an emblem, and printers that are rejecting jobs are shown as grayed-out to signify they are not available.