1. You have
a color picture like this
2. You want
to print the image with a laser printer or any ohter printer in black and
white. Or you want to create a special effect with a black and whit image.
PL32 offers many raster types to convert a color image to black and
Rasters are small rectangles, here a black points which correspont
to the color (intensity) of the color image by the size of the points or
the amount of points.
You can setup the raster at Layer/Convert Layer Type.
3. Here are some examples for rasters
4. Be aware that rastered images
should normally not be scaled when you print them. To avoid this, first
setup the resolution of your printer at Layer/Layer Properties. Then scale
the image to the size you want at Layer/Scale Layer. Here
you can setup the size of the image in mm.