To use Custom filters 1 Select one or more paint objects to adjust all the images. You can select an area in one image in edit mode to adjust the selected area only. If you don’t make a selection, the entire image in edit mode is affected. This command doesn’t work with paint objects in Black & White mode, and Indexed mode. 2 Choose Image > Filter > Other > Custom. In the Custom dialog box, type values from -999 to 999 in the boxes in the grid. Canvas ignores blank boxes. 3 Enter a Scale value from 1 to 9,999. To retain the general appearance of the original image, the scale should equal the sum of the entries in the configuration grid. For example: 4 Enter an Offset value from -9,999 to 9,999. Positive values increase the brightness of the final outcome while negative values decrease the brightness. Grid entries Sum Scale 2   2   1   -1   -1   3 2+2+1-1-1+3=6 6 -15    7    4    -3    2    8 -15+7+4-3+2+8=3 3 Custom filter Blurred image Custom filter Embossed image Original These boxes represent the pixels surrounding a target pixel This box represents the target pixel in an image
Canvas 8 Help: Image filters and effects (17 of 20)                                                 Page #723