Revision data: how to access it through GDL global variables
How to make a MEP Equipment object?
The usage of the MEP add-on in a library object
![](https://gdl.graphisoft.com/wp-content/uploads/HowToMEP_Feature.png)
How to create a custom Surface Catalog?
Create your custom Surface Catalog using ARCHICAD functions and external or internal elements.
![](https://gdl.graphisoft.com/wp-content/uploads/TipsAndTricksSurfaceFeature.png)
How to use Custom Components in your library?
User defined custom parts in a scripted library part.
![](https://gdl.graphisoft.com/wp-content/uploads/HowToCustomComponent_Feature.png)