PD
Pro has an expansion capability in the form of plugins. Plugins are
external programs that are able to work with PD Pro. Quite a lot of PD
Pro is implemented with plugins that are integrated with the program.To access new plugins, or plugins that don't have menu items, use the Plugin panel.
There
are some plugins that come with the program that do not have a regular menu
item, like this Cross Contour filter. New plugins may also become
available as an update, or from 3'rd parties.Plugins are categorized into five groups, Filter, Import, Export, Brush, and Misc. This keeps plugins grouped by their primary function.