Hi Artur,
While in the editor, you must select the button "Deploy for Player1".
Then in the map screen you may deploy the AUX/FIX units of player1.
Now, if you wish to set a specific deployment zone for the player's core force (campaign) you may hit the
shift + " ! " .
Now you must enter a value which represent the X vertical line that will designate the border of your deployment zone.
See the picture after I press shift+"!"
cheers,
Pyros