External screen in addition to the mac book prot mouse does not switch?

Hi
3

The mouse pointer can be seen on the external screen but when I open the laptop the picture is displayed on the laptop the mouse is still on the external screen to see how can I change the best?

Ma

How is the screen connected to the Mac, and when should the mouse pointer be displayed where?

Hi

A cable from the socket to the screen and one from the mac to the screen

if I make the mac book everything on the big screen is displayed to me but when I open it again the mouse pointer on the external and the image contents are again on the mac

Ma

Wow! A cable. What kind of one, HDMI, DisplayPort, Thunderbolt?

Which MacBook is this and which macOS is installed?

As the illustration is now, have previously described. But how is she supposed to be?

Mouse keeps hooking? pe peakunused