1. A surveying system having a position determination unit for determining a target position in a defined coordinate system, and having a mobile target unit for definition and/or position determination of target points in the coordinate system, wherein the surveying system is adapted to capture and/or receive image data that is related to a task image, the surveying system comprises a control unit for allowing a user to control surveying tasks of the surveying system in order to acquire surveying task data that is related to the surveying tasks and comprises spatial coordinates of at least one target point, and the control unit comprises a processor unit for processing the surveying task data, a data storage unit for storing the surveying task data, and an electronic graphical display for displaying a visualization of the surveying task data to the user, wherein: the data storage unit is adapted to store the image data, the processor unit is adapted to assign the image data to a set of surveying task data related to a surveying task, and the control unit is adapted to visualize on the display a surveying task list comprising a multitude of surveying tasks that are selectable by a user, wherein upon a selection, surveying task data of the selected surveying task is provided to the user, and wherein each of the surveying tasks is represented by a title of the surveying task and by a visualization of a task image.