elabel strlower or strproper all value labels

[Felix Kaysers]

I am using the ssc package "elabel" to handle value labels. I would now like to proper() the value labels of a specific variable. Using the ssc package labutil2, I could type:

sysuse auto
labvalch3 origin, strfcn(lower(`"@"'))

However, when I try to implement this code with the help of the elabel package, I run into a wall. I have tried different versions of elabel modify, but I can not get it to work.

elabel modify origin * (= strproper(@))