> For the complete documentation index, see [llms.txt](https://docs.zerve.ai/guide/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.zerve.ai/guide/canvas-view/layers-overview/development.md).

# Development

This is the layer where all the coding - data prep, model development, model evaluation etc. happens. Currently supports Python, R, SQL, GraphQL, Markdown, RMarkdown, GenAI Prompts

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Development Layer
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## **Grouping Blocks:**

Development layer has an inbuilt grouping option to group cells based on code functionality. This can be done by renaming the block to groupName.blockName. This will group all the blocks with same group name together. In the below example we can see data as a group name.

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Grouping blocks
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## **Passing Functions:**

Along with variables one can also pass functions between blocks as shown below.

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Passing Functions
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