ここについて質問があります。
This string appears in a tooltip of a label, which should work as a description or explanation here.
ください is more like some instruction which usually appears in a dialog or form: `Please specify the type here: ____`
And I found that there might be a nuance here as a description.

I wonder if it should be `…を指定` or `…を指定する` -- I'm a beginner of Japanese so I'm not sure at all.