The GUI is a customizable experimental control panel, configured here for vision experiments. The upper left corner is a monitoring window, showing a scaled depiction of the visual display. Fixation windows and eye position markers are at the center. Eight choice windows for Application 1 are also shown (correct choice in red, distractors in blue). Below the monitoring window are eye configuration and receptive field mapping tools, which can be substituted for other experiment-specific tools. Task control for starting, pausing, or stopping a protocol is at the center top, along with subject- and system-specific configuration parameters. The sending panel in the upper right allows the experimenter to modify task parameters in real time. The receiving panel below that is used to display information about the current stimulus and experiment progress. The lower right panel shows a data log.