Bounce Boards

What are the different ways you can use a bounce board in a shoot?  What are the differences between a square and a round bounce board?

    The different ways that you can use a bounce board in a shoot are by holding it or by using a duckbill clamp in order to be able to put it on a C-stand. The primary use of a bounce board is to diffuse lighting, which can soften harsh shadows and more evenly wrap around the face. The differences between a square and round bounce board are the shape that the board has in the reflection of the eye. Although there isn't anything necessarily wrong about having the square reflection, it looks more natural to have a circular reflection because of the spherical shape of the eye.