When I group a table based on a single select field, it seems to position the “blank” group, i.e. the group of records with nothing selected for this field, at the top. How can I change this so that this group is instead positioned at the bottom, i.e...

I have a field that contains people’s heights in centimeters. I’d like to create an additional field that converts those heights to feet and inches, specifically using the format #’#". The conversion part is easy; to get from centimeters to inches, ...