Pan and Tilt very small down angle

how to increase the pan down limit?

pan diwn is almost flat.?

You can’t increase the downwards angle anymore than what it is now. Alternatively you could attach the camera to a ceiling upside down and change the orientation so there is more movement for you

Sound like product is designed for ceiling mount.

I think I will make a wedge block for table.
but will the unit stay at where user left it to guard as the lens is now higher.