You can manually define a "User Defined Language" (UDL) for PML.

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: You cannot run PML code directly from within the Studio; code must still be executed within the main application (e.g., E3D or PDMS).

AVEVA PML Studio is a free development environment originally released in 2013 to modernize coding in PML (Programmable Macro Language)

Aveva PML Studio Free is a limited but functional version of the full PML Studio software. It is designed to provide users with a taste of the software's capabilities, allowing them to develop, simulate, and test simple control strategies. While it may not offer all the advanced features of the paid version, Aveva PML Studio Free is a valuable resource for students, hobbyists, and professionals looking to familiarize themselves with process control design principles.