[NTG-context] Index entries - custom font size

Hello Everyone, there are lot of index entries in my document and with the standard body font size they occupy too much space. I've tried to decrease the size by the textstyle parameter. It works, but it is applied recursively to every nested level: secondary items are smaller twice and tertiary items three times... \setupregister[index][command=\Word, textstyle=small] \starttext \index{primary}\index{primary+secondary}\index{primary+secondary+tertiary}Te xt \completeindex \stoptext How can I set the same value to all the levels? Thanks, Jan