To specify the screen ruling in Illustrator, choose File > Print, and then choose Output from the menu on the left. When printing separations, specify the appropriate screen ruling to produce 256 levels of gray.Before printing a document, specify a resolution that reflects the printer's resolution. To specify a resolution for a raster effect, choose Effect > Document Raster Effects Settings, and then specify 72 ppi for resolution.Specify a Line Art And Text Resolution Option setting from a Transparency Preset or from a custom transparency setting that reflects the printer's resolution. To specify transparency settings, choose File > Print, then choose Advanced from the menu on the left.Use optimal resolution settings for rasterized objects and effects by doing one or more of the following:.Make sure that the files' resolution in pixels per inch (ppi) or samples per inch (spi) is twice the line screen (lpi) of the printer. Save imported raster image files at a resolution optimized for the intended print resolution.To create efficient Adobe Illustrator files, do one or more of the following: