Blank Supply order
The blank supply order is like the regular supply order, but does not show all the order details automatically. Instead, the relevant order details will have to be encoded in the supply order template. This way, you have full control over what information is and is not sent to each supplier.
To send a supply order as text (not pdf) use the Text-only supply order workflow transition.

See also
Supply order
Text-only supply order
Variables in Supply order
How to configure supply order templates