# Configuration

Configuration is the second half of Mermaid, after deployment. Together Deployment and Configuration constitute the whole of Mermaid. 

This section will introduce the different methods of configuring of the behaviors and appearances of Mermaid Diagrams. 
The Following are the most commonly used methods, and are all tied to Mermaid [Deployment](./n00b-gettingStarted.md) methods. 

## Configuration Section in the [Live Editor](https://mermaid-js.github.io/mermaid-live-editor).


## The `initialize()` call, for when Mermaid is called via an API, or through a <script> tag. 


## [Directives](./directives.md),

allows the limited reconfiguration of a diagram just before it is rendered. It can alter the font style, color and other aesthetic aspects of the diagram. you can pass a directive alongside your definition inside `%%{ }%%`, either above or below your diagram definition. 

## Theme Creation:
An application of using Directives to change [Themes](./theming.md). `Theme` is an value within mermaid's configuration that dictates the color scheme for diagrams. 


If you are interested in altering and customizing your Mermaid Diagrams, you will find the methods and values available for [Configuration](./Setup.md) here. It includes themes