Sometimes 2D data objects are
very similar to each other, or the user opened the same data twice in a single data view.
In this case, the shift spectra function is useful to separate 2D data objects that might be overlaid in a 2D data view. Available objects
in a 2D data view are shifted against each other to separate overlaying data. This function is only available, if multiple 2D data objects are
merged in one data view. It can be applied multiple times in order to increase the distance.