Menu > Printers > right click (over printer) > Set Default Printer > Set as my personal default printer.
If Set Default Printer is disabled
Open the printer via panel notification applet (lower right corner) > <printer>.
- After that, repeat the first step.
- If there is no printer applet in the lower right corner:
Menu > System Settings > Applets > Manage > Printers > Settings > Show printer icon: When printers exist