Tham khảo tài liệu 'hướng dẫn sử dụng coreldraw x5 - part 89', công nghệ thông tin, đồ họa - thiết kế - flash phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 864 CorelDRAW X5 The Official Guide Here s what the options in this dialog control Screening Technology This selector drop-down contains scripts for specific printing technologies such as Agfa and Linotronic image-setting devices. When Standard Defaults is used as the Screening Technology other options are set according to settings for your specific printer driver accessed through Properties on the General tab. Resolution This displays the output resolution of your printed material the default value of which is set according to the Screening Technology selected. A service bureau or your print vendor will know the specifics. Basic Screen This option sets the resolution as measured in lines per inch of the screens rendered in your output material. Check with your print vendor for the exact setting needed. If you need to adjust this value various choices will appear depending upon which Screening Technology and image setter Resolution is currently selected. The options shown in the Basic Screen section will also be available back in the Separations main tab. Halftone Type The Halftone Type selector is used to set the shape of the actual dots that compose the screens in the final output. Using this drop-down menu you can choose to use such shapes as the Default Dot Line Diamond Elliptical Euclidean Lines Grid Microwaves Rhomboid and Star. If you re just getting into commercial printing anything other than a dot halftone shape is used either because the print press pulls better prints or because you really know what you re doing and want to create an effect in the finished print job. Microwaves for example is a special effect that sounds interesting but you would need to have already seen the CHAPTER 27 Printing Professional Output 865 effect on a printed sample before choosing it and then you would do a short run to see whether the example produces the same effect in your own piece. On the other hand Elliptical and Star shapes can be used to sharpen the output of a .
