Instructions
Build an orbital command attachment onto your command center in a multiplayer match of "StarCraft II" by clicking on "Command Center" then selecting "Orbital Command" in the unit's pane at the bottom of the screen.
Click on the orbital command once it has finished being built.
Click "Mule Pod" in the unit's pane at the bottom of the screen.
Click an area near your command center to send a drop pod down. When the pod lands, a mule will emerge from it.
Click on the mule to select it.
Right-click on a resource to have the mule start gathering resources from it. It will continue to do so until the resource is exhausted.