Optoma ZU850 Warping and blending software Manual - Page 7

 Projector output black pattern. Test Pattern  Show the grid pattern on projection screen. Warp  Warping adjustment type.  The function hide if projector support new warping algorithm. Select Warp Cursor  One selected point can adjust warping.  Use 【W】, 【A】, 【S】, 【D】on the key board or simply use mouse. The selected cursor will be change into blue color. Move Warp Cursor  The selected point can move coordinate to do warping adjustment.  Move cursor, use on the key board. Reset  Click on the button will reset Warp settings. Adjustment procedure:  Choosing less grid number then increases the grid number step by step, so we usually use 2x2 to setup four corners at first.  After using more grid number then choose less grid number will lose the early detail settings.  Adjust the outer cursors as the red ones shown below, and then adjust the inner cursors as the green ones shown below.  After adjusted inner cursors then adjusted outer cursors will lose the inner cursors settings.  Using less grid number adjustment is easier to get homogeneous deformation.