Blender help (Modeling)

[AadamZ11]

Does anyone know how to Mirror stuff in blender? as in make one half, Mirror it and have a whole object?
I am trying ti make vehicles and, not so good at both parts. I thought it would be more easy to mirror one half and edit from there.

-AZ-

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[The Corporation]

Sometimes, google can come up with some interesting stuff.
Such as this

[Barnabas]

You can use the mirror modifier.