preview level control with vst instruments in media bay

Does anyone know how to adjust the preview level when previewing vst instruments in the media bay. In this case it’s to loud when I am auditioning Halion 5 presets. I want to be able to adjust the levels for this preview like I can when previewing audio.

The little volume level control that is there for audio does not show up for VST’s like it says it does in the manual?