The xyscan window features a status bar. The bar is divided into two parts. On the left, status messages and instructions are displayed that help you scan your plot. On the right, the current cursor x, y coordinates are displayed. They are shown initially in pixel coordinates but are replaced by plot coordinates as soon as this is possible, i.e., all markers are set. They are identical to the ones shown in the Coordinate Display window.
If you use the Measure Tool a third label appears displaying the measured distance (dr) in blue as shown below. It will disappear when you stop the measure tool.