This panel allows pixel-by-pixel examination of the current image. An 11 x 11 pixel blowup of a selected region appears with the same false color scaling as is set in the Image Panel. To start, click the START button. A cursor will appear in the upper-left-hand region of the Image Panel. Click on the cursor and drag it to the desired position. The boxes below the DONE button will show the current X and Y of the selected pixel, which is also the center pixel (outlined in a blue box) in the smaller image to the right. The box at the top right continuously updates the current values of Q, Qx, Qy, 2- Theta, and Chi for the center pixel.
For more accurate positioning, you can type the coordinates of the desired pixel position into the X-pixel and Y-pixel boxes.
Don't forget to click DONE when you are done, otherwise, future centering or plot selection operations may fail.