In addition, XLong uses dialog windows to input specialized parameters
necessary for the different reduction steps. These windows
contain text fields, option menus and radio buttons.
Values are given by moving the mouse inside the parameter fields
or selecting an option by clicking on the relevant button. Push-buttons
yielding to a dialog window are indicated by three dots in the label.
For example, clicking on 
pops up the Rebinning window.
This window can be closed by clicking its 
button.
Figure: Main window of the GUI XLong