How to add a column to filter in grid, in web designer

I have a request property that uses the department column. When users of the web portal choose a department, only the column Fullpath is shown. I do not want the users to manually add the column Departmentname, but rather have that column as default, instead of Fullpath. 
In the web designer, I have found VI_ObjectCollection_Hierarchical and suspect I have to change something in the Grid band, but there my knowledge stops.

Version 9.2.

Regards

Rune Hystad