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

# Personalization Variables

> Configure template variables (custom and auto-filled) so each recipient sees a correctly personalized email.

<img src="https://mintcdn.com/startosphere/Hvo07E1VjXeJ8Wh7/images/image-6.png?fit=max&auto=format&n=Hvo07E1VjXeJ8Wh7&q=85&s=4c5af46f113597d97c86568f90f9f423" alt="Campaign email editor showing variable settings" width="2048" height="1176" data-path="images/image-6.png" />

## What you can do

* Fill in all variables used by a template from one place.
* Separate “template-level” inputs (event name, sender title) from “recipient-level” inputs (first name).
* Avoid broken placeholders in previews and test sends.

## Where to find it

* In a campaign email editor, open the **Variables** panel.

## Variable types

Variables typically fall into two buckets:

* **Custom variables**: you fill these for the campaign/email (e.g., event name, calendar URL, discussion topic, sender name/title).
* **Auto-filled variables**: the platform fills these from recipient/system data (e.g., `{{first_name}}`, `{{unsubscribe_url}}`).

## Steps

1. Open **Variables** in the email editor.
2. Fill required custom variables.
3. Click **Done** to apply values back into the design.

## Troubleshooting

* If you still see `{{...}}` in preview, a required custom variable is missing.
* If personalization looks wrong for a recipient, check audience data (e.g., missing first name) and retry preview.

Related guide: [Preview & test emails](/guides/campaign/preview-and-testing)