To move the entire frame, choose the Selection tool in
the 3D Transform dialog box and drag an edge of the wireframe.
To move an anchor point, choose the Direct Selection tool in
the dialog box and drag an anchor point on the wireframe.
To add an anchor point, select the Add Anchor Point tool in
the dialog box, and click the right side of the wireframe. For example,
you can add an anchor point to more closely fit the cylindrical
wireframe to a photo of a bottle.
To change an added anchor point from a smooth anchor point
to a corner anchor point and vice versa, select the Convert Anchor
Point tool in
the dialog box, and click the point. A smooth anchor point creates
a gentle curve when you adjust it; a corner anchor point creates a
sharp corner.