A system comprising: a camera having a three-dimensional field of view and being configured to sense a position of a first object and a position of a second object in the field of view ; and a controller coupled to the camera and configured to: define a first zone within the field of view at a first location and the first zone defining a range of acceptable positions for the first object relative to a position of the camera ; define a second zone within the field of view at a second location different from the first location and the second zone defining a range of acceptable positions for the second object relative to the position of the camera ; receive the position of the first object and the position of the second object ; and execute a graphical user interface configured to aid in positioning of the camera relative to the first and second objects and the graphical user interface being configured to display image representations of: the field of view ; the first zone relative to the field of view ; the second zone relative to the field of view ; the position of the first object relative to the first zone ; and the position of the second object relative to the second zone . a camera having a three-dimensional field of view and being configured to sense a position of a first object and a position of a second object in the field of view ; and a controller coupled to the camera and configured to: define a first zone within the field of view at a first location and the first zone defining a range of acceptable positions for the first object relative to a position of the camera ; define a second zone within the field of view at a second location different from the first location and the second zone defining a range of acceptable positions for the second object relative to the position of the camera ; receive the position of the first object and the position of the second object ; and execute a graphical user interface configured to aid in positioning of the camera relative to the first and second objects and the graphical user interface being configured to display image representations of: the field of view ; the first zone relative to the field of view ; the second zone relative to the field of view ; the position of the first object relative to the first zone ; and the position of the second object relative to the second zone . define a first zone within the field of view at a first location and the first zone defining a range of acceptable positions for the first object relative to a position of the camera ; define a second zone within the field of view at a second location different from the first location and the second zone defining a range of acceptable positions for the second object relative to the position of the camera ; receive the position of the first object and the position of the second object ; and execute a graphical user interface configured to aid in positioning of the camera relative to the first and second objects and the graphical user interface being configured to display image representations of: the field of view ; the first zone relative to the field of view ; the second zone relative to the field of view ; the position of the first object relative to the first zone ; and the position of the second object relative to the second zone . the field of view ; the first zone relative to the field of view ; the second zone relative to the field of view ; the position of the first object relative to the first zone ; and the position of the second object relative to the second zone . <EOS>