There are 4 different types of windows which can be specified within XRONOS: time, phase, intensity and exposure windows. In applications requiring more than one input series (e.g. a cross-correlation analysis) intensity and exposure windows are specified separately for each series. Intensity and exposure windows can be specified separately for bins, newbins and intervals. Command win is to create, read or change XRONOS window files (default extension .wi). Many XRONOS application use some default exposure windows, which are designed to avoid analysing data sets which are too inhomogeneous with respect to their statistical properties.