---
title: Adding custom fields to your Email Thermometer template
description: Easily personalize Email Thermometers by adding custom fields like recipient names using [custom_1] tags.
---
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August 10, 2025
# Adding custom fields to your Email Thermometer template
### **Adding personalisation with custom fields to your Email Thermometer template**
You can add a custom field to any text box within the Thermometer settings area which indicates they are available as shown in the box below.
In the example above, let's say you are capturing the recipient's first name in custom 1 within the list you have uploaded and intend to send your survey Blast too. Entering \[custom\_1\] will then pull in the recipient's first name into the body of the text.
You can enter as many custom fields as you wish. Ensure they are populated within your List, otherwise they will be blank to your recipient.
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