Optimizely Content Management System (CMS) comes with a preconfigured TinyMCE editor that renders all XHTML properties by default.

The default configuration for TinyMCE uses the constants defined on the `EPiServer.Cms.TinyMce.Core.DefaultValues` class. See [Plug-ins](🔗) .

The `DefaultValues.EpiserverPlugins` constant defines the default Optimizely plugins:

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Note

The epi-dnd-processor is a required plugin to drag and drop Optimizely content.

The `DefaultValues.TinyMcePlugins` constant defines the default TinyMCE plugins:

The `DefaultValues.Toolbar` constant defines the default toolbar configuration:

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### Overriding the defaults

To override the default settings, use `ServiceCollection` extension.

The `TinyMceSettings` class provides helper methods for setting the most common settings within TinyMCE, which map to the configuration settings documented on [TinyMCE's website](🔗).

However, you can configure settings that do not have a helper method by using the `AddSetting` or `RawSettings` methods.

When overriding the defaults, you should call the `AddEpiserverSupport` method to get the basic Optimizely plugins and styling configured.

`AddTinyMceConfiguration` should be added to the _Startup.cs_ like:

## Related blog posts

• [Add a character map to TinyMCE](🔗)

• [Change the delay between subsequent saves in Optimizely TinyMCE](🔗)

• [Customize TinyMCE at runtime in CMS 11](🔗)

• [Configure default toolbar buttons in TinyMCE 4 for Optimizely](🔗)