LEVEL to hide objects in draft

Quick way would be to remove them from drawlist attached to your view, time consuming if you have many.

What level we have to set if we wish not to generate those objects in draft?

For example,

Under SUBE i had couple of CYLI & BOX

I want to generate a drawing of CYLI only, in this case what level we have to define for boxes?

The problem is here i dont have control in draft.

So i am looking a way to control from design

It depends of the settings in draft,  check with level 0 but at the end it depends on the settings of Representation styles and rules you're using.

Level 2 10