The Measure Tools window is a dockable window, which contains a number of buttons at the top enabling you to select the type of measurement you want to do.
For all measurements, the X, Y, and Z coordinates of the Start point and End point are displayed in the text boxes underneath the buttons, together with the Difference and the absolute Distance. If you use accumulative measure, such as Point Line or Accumulate, Distance shows the accumulated distance for all points registered in the measurement.
Note: Z coordinate values are not available for 2D sheets.