Are you just trying to use the PTZ control for the camera? That is in "liveview" on the local monitor. Select the camera and a row of icons will show up. Click on the joystick looking icon and it will give you the up/down/left/right/zoom in/zoom out.
If you are trying to use ptz controls on the browser then it is on the right side of the screen. Click on the "<" (arrow) to bring out the PTZ controls.