> ## Documentation Index
> Fetch the complete documentation index at: https://docs.letterbucket.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Custom Blocks

> Design reusable content components once and insert them into any newsletter in seconds

Custom Blocks let you build pre-styled content components — like headers, footers, or signatures — that you can reuse across any newsletter. Design it once, insert it anywhere.

<Info>
  Custom Blocks require a **Growth** plan. If your current plan doesn't include this feature, you'll see an upgrade prompt when you visit the Custom Blocks section.
</Info>

## Accessing Custom Blocks

Go to **Custom Blocks** in the left sidebar. From here you can see all your saved blocks, create new ones, and manage existing ones.

## Creating a block

1. Click **Create block** in the top right.
2. The block editor opens — it works just like the regular post editor.
3. Design your content: add text, images, buttons, or any other supported element.
4. Give your block a name using the title field at the top.
5. Save when you're done.

Your new block will appear in the Custom Blocks list and will be available to insert into any post.

## Inserting a block into a post

Open any post in the editor and use the **/** command menu or the **+** button to insert a Custom Block. Select the block you want and it will be dropped into your post at the cursor position.

## Managing your blocks

From the Custom Blocks list you can:

* **Edit** — click a block to open it in the editor and make changes.
* **Duplicate** — create a copy of an existing block to use as a starting point.
* **Delete** — remove a block you no longer need.

<Warning>
  You can have a maximum of **50 custom blocks** per newsletter.
</Warning>