With the 'Image freezing' function available in the CM70 camera web GUI (SYSTEM tab > PTZ) you can freeze the image when the camera moves from one preset to another preset when you use your (remote) controller.

But when streaming the freeze frame causes the need for the streaming pipeline to be broken off and to be rebuilt which can eventually produce some artifacting (pixels over the image,..) 

In these cases we would recommend to switch the video when the camera is in position or to disable the Image freezing and play with the speed between the presets which can have a smooth and nice result