Insert Code Block
Release 3.3.0 and above.
The code block feature adds a dedicated block where you can write code within a document.
Through code blocks, you can express code clearly and readably when writing technical documents or development-related documents.
// synapeditor.config.js
{
'editor.toolbar': [
// ...
'codeBlock' // Adds the code block button to the toolbar
// ...
]
}

Applying Code Block Highlighting Theme CSS
When you apply the code highlighting plugin, calling getPublishingHtml() in the editor returns HTML in a form that can be highlighted.
See more: Code Block Highlighting
