Displays are provided for a graphical user interface including a device capacity mimic in a job manager in a system, such as a xerographic machine. The displays include a visual representation of the available capacity of each of a number of devices for the system, such as each output destination for a printer with multiple output destinations. The device capacity mimic shows the effect of jobs in progress on the available capacity, each job consuming a portion of the available capacity. Using this mimic, the user may, for example, revise the destination of jobs that have been planned but not yet started (e.g., by dragging the job). A mimic view of this information with a graphical user interface for managing the device assignments is provided. Thus, a user may not only view information about the device assignments for jobs, but also control or manage the device assignments for jobs.