Dell 3300mp angle issue ?

Hi,

I have a Dell 3300mp projector, When mounting it about 4 feet of the floor above/behind the couch. I noticed the projector has to be "aimed" at a steep angle (downwards, exactly 20*+ degrees) which seems to cause some screen/text distortion.

I also had the use the keyston in "manual" to produce a squarer projected image.

Is there anyway to adjust the projectors image output up & down ? Keystone correction has nothing to do with vertical adjustments ?

Does this sound normal to you ?

Thanks again.