Area Zoom

The Are Zoom use the PTZ Move Commands for Click-to-Move and Drag-to-Zoom. The ONVIF driver will support it only if the device supports the optional translation space. See https://www.onvif.org/specs/srv/ptz/ONVIF-PTZ-Service-Spec-v1712.pdf (Section A.3.2 Pan/Tilt Translation Space in FOV).

For more details how Area Zoom is implemented see Area zoom implementation.