> For the complete documentation index, see [llms.txt](https://docs.flosum.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.flosum.com/data-migrator/templates/template-designer/adding-fields-to-objects.md).
# Adding Fields to Objects
##  Overview
This guide explains how to add fields to objects within a template. During data migration, only the selected object fields are migrated.
{% hint style="warning" %}
#### Preserving Relationships
To preserve the link between parent and child records during migration, migrated child records must include the **Relationship Field** that connects them to their parent. This applies to both Master-Detail and Lookup relationships. To learn more about this, see the following article.
* [Preserving Object Relationships](/data-migrator/templates/template-designer/preserving-object-relationships.md)
{% endhint %}
## Add Fields
{% stepper %}
{% step %}
### Select Template
1. Click **Templates** from the left sidebar menu.
2. Click the template to add object fields to.
{% endstep %}
{% step %}
### Add Fields
{% hint style="info" %}
#### Data Masking
Data Masking allows you to mask sensitive fields during migration by replacing them with random data before they are copied to the target organization. To learn more about Data Masking and how to apply it to a field, see the following article.
* [Applying Data Masking to Fields](/data-migrator/templates/template-designer/applying-data-masking-to-fields.md)
{% endhint %}
1. Click the object to add fields to.
2. The Object's **Field List** opens on the right side of the designer.
3. Search or scroll to find the fields to add.
4. Check the checkbox next to each field to add.
5. Click **Save** once all the fields to add have been checked.
6. The **Fields** count for the object will update to reflect the new number of selected fields.
7. Repeat this process to add as many fields to objects as you need.
{% endstep %}
{% step %}
### Save Template
Once you are done adding fields to objects:
1. Click **Save template** to save your changes.
{% endstep %}
{% endstepper %}
---
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