To use simply select a symbol from the symbols palette and then apply the toolbox plugin - a. The plugin appears in the Adobe Illustrator toolbox as a collection of tools. SymbolToolbox v.10.1 SymbolToolbox is an Illustrator plugin for multiple symbol manipulation.Black Hole/Illustrator plugin v.1.2.1 Black Hole/Illustrator plugin 1.2.1 is considered as a flexible and effective tool, designed to allow you to create inset/oval perspective effect, control rotation, inset effect, create stunning zoom effects, control stroke width, and other path.