Abstract: An electronic device displays on a display device, a user interface including a first user interface element, the first user interface element being associated with the illumination element, and detects a first input at a location corresponding to the first user interface element. In response to detecting the first input and in accordance with a determination that the first input meets first criteria, the device changes a beam width of a light beam emitted by an illumination element from a first beam width to a second beam width, wherein the second beam width is different from the first beam width.

Abstract: In response to a printing system fault or controller restart, a printing system print controller may present an interactive graphical job recovery user interface. The user interface may present one or more images that the print controller believes have printed successfully and/or a next page image scheduled to be sent by the print controller to the printing system print engine for printing. The user interface may allow a printing system operator to scroll forward and/or backward through the set of page images arranged in their respective print order until the user interface displays the correct page image that the print operator can confirm has printed correctly, based on an inspection of the print job. The print controller may resume the print job by sending to the print engine the page image from the stored image repository that follows the image confirmed by the printing system operator to have successfully printed.