3.3.5.2.6.5 Processing Window Snap PDU
On receipt of the Client Window Snap PDU (section 2.2.2.7.5), the server SHOULD move the remote window specified by the WindowId field to the coordinates specified by the Left, Top, Right, and Bottom fields. When moving the window, the server SHOULD use a feature such as Snap that can restore the window’s size when it is unsnapped. If no such feature is available, the server SHOULD NOT advertise support for this PDU.
In all other respects, this PDU is equivalent to the Window Move PDU (section 2.2.2.7.4) and SHOULD be handled the same way.