# Create UML Diagrams
GROWI can use PlantUML (opens new window) to draw UML diagrams.
Refer to Real World UML (opens new window) for some examples on how to use PlantUML.
# Example:
``` plantuml
class RemarkPlugin {
+ transform(syntaxTree: AST): AST
}
```
or
``` plantuml
@startuml
class RemarkPlugin {
+ transform(syntaxTree: AST): AST
}
@enduml
```