HP digital mp3130 ユーザーズマニュアル

1. Rotate the focus ring until the image becomes clear. The projector can be focused 

at distances of 1.2 to 12 m (4 to 40 ft). 

2. Rotate the zoom ring to adjust the picture size from 100 to 120%.

If the picture does not fit the screen, you might have to move the projector closer to the 
screen.