= Align objects =

You can align objects using handle snapping:
    
# Select the first object with the Transform tool and press
  ((RMB)) to finish the selection.

# Press ((T)) to switch to the  [translate manipulator|/basics/handles].

# To temporarily detach the manipulator from the object, select the handle and press ((')).

# Press ((RMB)) on the handle and choose __Align Handle > Start Orientation
  Picking__. Click two adjacent edges of a face on the object to
  move the manipulator to their intersection.

# Press ((')) again to reattach the manipulator to the geometry,
  so moving the manipulator will move the geometry along with
  it.

# Press ((RMB)) on the handle and choose __Align Handle > Start Orientation
  Picking__. This time, click two adjacent edges of a face _on
  the other object_ to move the manipulator to their
  intersection.

  When you snap the first object's manipulator to the edges on
  the other object, it moves and orients the first object.