AVer FD1020 quick guide - Manual (Page 7)

3
b. Use screws to secure the camera on the ceiling or the wall.
[Note] Do not lock it completely because you might need to adjust the lens angle
later.
c. Unscrew the lens to adjust the angle.
d. After adjusting the lens,screw it tight. Repeat steps b and c as you need during the
whole process.