papalemon

My school uses Hotpotato, Hot Potatoes Home Page It's a freeware and designed more for teachers and students..

haha I'm not really sure of the standard. I do agree on the last sentence though....

any one know if the projection screen have a 25 Degrees half viewing angle, so what's the full viewing angle? is it 50 degree total? or it's 25 degress total? I'm actually looking at Da-lite IDEA Screen.

Have you swap the two cables to see if there's any changes? ie, Projector A to the splitter port for projector B was using and projector B to the splitter port for projector A?