NEC PA721X - Page 117

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5. Using On-Screen Menu
CORNERSTONE
Displaythe4-pointcorrectionscreenandadjustthetrapezoidaldistortionoftheprojectionscreen.
Pleasereferto“CorrectingHorizontalandVerticalKeystoneDistortion[CORNERSTONE]”(→page35)fordetails
ontheoperation.
HORIZONTALCORNER/VERTICALCORNER
Distortioncorrectionforcornerprojectionsuchaswallsurfaces.
HORIZONTAL CORNER
������������������������������ Performs correction for projection onto a wall lying at an angle to the horizontal direction�
* Reverse angle correction is also possible�
VERTICAL CORNER
������������������������������ Performs correction for projection onto a wall lying at an angle to the vertical direction�
* Reverse angle correction is also possible�
NOTE:
• Whenthemaximumadjustmentrangeisexceeded,distortionadjustmentisdisabled.Setuptheprojectoratanoptimalangleas
thedeteriorationintheimagequalityincreasesasthedistortionadjustmentvolumegetslarger.
• Pleasenotethattheimagewillgooutoffocusduetothedifferenceinthedistancebetweentheupperandlowerorleftandright
sidesandthecenterofthescreenforprojectionscuttingacrosscorners.Lenseswithshortfocalpointsarealsonotrecommended
for projections cutting across corners as the image will go out of focus.