Delivery document Header - Output status is yellow, not green

Hi All,

I have a delivery document output question here, would you please give some suggestion here.

The question is:

use vl03n to open an delivery document -> click menu "Extras-delivery output-header" , the status light is yellow, showing "not processed",

How can i configure to make it as green, as soon as i enter the header output of a delivery document. Is it about delivery output determination. The yellow and expected green is attached as snapshot here. Thank you very much for your input.

Thanks

mark