Zoom Workplace on Tablet

[Les4]

Using Zoom Workplace on my tablet the video camera is zoomed out such that it shows the whole office. I cannot find a way to make the camera zoom in. I tried pinching the screen and that does not work and I cannot find any settings to change the camera. I tried to use the virtual background and when it tries to load it comes up with an error. Any ideas or help would be greatly appreciated.  Les