Creating Variants in MIGO to block tree display in item overview

Hi,

I would like to know how to create Screen Variants in MIGO to hide the Tree display from the Item overview block.

Also I wish to know how to set this variant as default settings. Because of this, user will not be able to even view the the sub-parts during GR.

I am looking for this, to prevent users from removing the sub-parts which are under that parent part.

So they can be allowed to display only during display of document.

Would be more thankful if you can send the detail steps to puppysap@yahoo.com.sg

Thanks,

Pri