You can reduce data for transparency, for gradients, or for bitmaps. When you reduce the data, on many printers you will not see a reduction of printing quality. But the printing time is substantially shorter, and when you print to a file, the file size is much smaller.
可以减少透明度、渐变效果或者位图等数据。如果您减少打印数据，在很多打印机上看不出打印质量有所降低，但是打印时间会大大缩短，若是打印到文件，则文件大小会大幅减小。