Optoma ZU850 Warping and blending software Manual - Page 14

Canvas  Black level only support rectangular shape, there are four points to determine the rectangular shape.  Default color of upper left point is red.  Default color of upper right point is green.  Default color of lower left point is cyan.  Default color of lower right point is yellow.  The select point will turn to hollow.  Select the control point, use 【W】, 【A】, 【S】, 【D】 on the key board or simply use mouse.  Use mouse to drag and put the control point to the desired position.  Use on the key board to process fine tuning. Transparent  Default transparent is 2.2. Palette  Black Level support five palettes, default color is black.  Click on a row of palette table will show palette dialogue, the dialogue can pick the palette color.  The selected palette will turn to light gray background.