Ability to specify non-standard parameters for prior corrections is absent in the GUI

[a-s-russo]

In RJDemetra, we are able to specify additional parameters for prior corrections as appropriate. For example, for level shifts (LSs), we can choose to have them as being 'zero-ended' or 'one-ended'. Is this possible in the GUI? There is no option in the relevant dialogue box for LSs, for example:

Similarly for transitory changes (TCs) and seasonal outliers (SOs), how can we specify the rate and period parameters, respectively?