How to bring up the PTZ Panel & Preset button (4.0)

Switch to the single view first.   click on the video image. 
At the image bottom, it should popup the control menu.   Choose PTZ icon.

Other Useful Tips:

1. Drag the image to adjust PTZ View direction.

2. Click on the image to focus automatically.

3. Scroll up/down to Zoom in/out.
4. Click the lower-right corner icon to set the Preset.      (see the Red Arrow;  Preset button)