The many forms of transparency

If all there was to transparency was the opacity option, you wouldn't need any help from me.…Reduce the opacity value and the selected path, group or layer becomes translucent.…I have given you some helpful keyboard shortcuts, but otherwise that's all there is to it.…But that's not all there is to it.…You also have Blend modes which introduce translucency by merging the colors of a selected object…with those of the objects below.…For example, there is the Multiply mode which creates the effect of printing one ink on…top of another, so everything darkens.…

There is the Screen mode which works like shining your path outlines on a screen, so…everything becomes brighter.…There is Luminosity, which mixes the detail from the selection with the colors of the…objects below, and many, many more.…Like so much of what you can do in Illustrator, transparency is not part of the PostScript printing language.…Illustrator works around this potential incompatibility by converting translucent objects to PostScript-…