modify sales order template in version 9.0.2

I saw some post on the web, but I could not understand how to change the template.
I’m using version 9.0.2
What I want to do is something simple.
remove the rows from the item box and change the quantity to the beginning before the product :unhappy:


What template are you using ? PDF or ODT ?

For PDF :
For ODT :

I’m Brazilian, I really like Dolibarr.
I’m using a thermal printer with bluetooth connection, printing happens, but I need to get 3 to 4 blank lines out, I’ve changed the margins but it did not work.
How should I proceed?