For this step in the calibration process, set the approximate position of the beam center. (This is the position where the direct beam would hit the detector; it is usually hidden by a beam stop so you have to make an estimate). You can do this by dragging the beam center position on the false color image, or by typing in the "X-Center" and "Y-Center" boxes. Note that some previous versions of Datasqueeze required you to click, not drag, to find the center position.
Click Next when you are ready to go on to the next step, Back to return to the previous step, or Restore to abort the entire process.