---
title: "Add a subform in Report Builder"
slug: "adding-a-subform-in-report-builder"
updated: 2026-09-28T06:23:24Z
published: 2026-09-28T06:23:24Z
canonical: "help.quickbase.com/adding-a-subform-in-report-builder"
---

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

# Add a subform in Report Builder

## Overview

You can add a [subform](/fastfield/docs/creating-and-using-subforms) to your PDF report in the Report Builder. This is useful when a submitted form includes a subform and you want its data mapped to your PDF report. For example, if you have a subform for a list of inspected equipment and you wanted these details in your report, you could make a table similar to the example image. Then, you need to map the subform details on top of the table.

![Table mapped to a subform in a PDF report](https://cdn.document360.io/dd260e4e-10bb-4b66-8fb3-5504c272b904/Images/Documentation/360095586311?sv=2026-02-06&spr=https&st=2026-10-30T11%3A02%3A11Z&se=2026-10-30T12%3A02%3A11Z&sr=c&sp=r&sig=oDMYAsgaNKMFYlxxHiEBqmt%2B9qvgmMcbWQrOiclXh68%3D)

## How to add a subform to your PDF report

1. On the table you have for your report template, select your desired **field** and adjust the **bounding box** handles.

![Bounding box handles adjusted for a field on the report template table](https://cdn.document360.io/dd260e4e-10bb-4b66-8fb3-5504c272b904/Images/Documentation/360095658432?sv=2026-02-06&spr=https&st=2026-10-30T11%3A02%3A11Z&se=2026-10-30T12%3A02%3A11Z&sr=c&sp=r&sig=oDMYAsgaNKMFYlxxHiEBqmt%2B9qvgmMcbWQrOiclXh68%3D)
2. To **add another field**, you can copy and paste the first one and adjust it to fit.
  - When clicking and dragging a field, it will snap into place to align with other fields next to it.
  - When you select more than one field at once (by clicking and dragging or by holding down Shift and multi-selecting), the **Tools** menu will become available for more options:

![Tools menu options available when multiple fields are selected](https://cdn.document360.io/dd260e4e-10bb-4b66-8fb3-5504c272b904/Images/Documentation/360095675772?sv=2026-02-06&spr=https&st=2026-10-30T11%3A02%3A11Z&se=2026-10-30T12%3A02%3A11Z&sr=c&sp=r&sig=oDMYAsgaNKMFYlxxHiEBqmt%2B9qvgmMcbWQrOiclXh68%3D)
3. Change the **instance number** so that it populates the second instance into the table when the subform is filled out.
  - You can also select multiple fields at once to assign instance numbers to multiple fields. ![Multiple fields selected to assign instance numbers](https://cdn.document360.io/dd260e4e-10bb-4b66-8fb3-5504c272b904/Images/Documentation/360095658472?sv=2026-02-06&spr=https&st=2026-10-30T11%3A02%3A11Z&se=2026-10-30T12%3A02%3A11Z&sr=c&sp=r&sig=oDMYAsgaNKMFYlxxHiEBqmt%2B9qvgmMcbWQrOiclXh68%3D)![Instance numbers assigned to selected fields](https://cdn.document360.io/dd260e4e-10bb-4b66-8fb3-5504c272b904/Images/Documentation/360095658412?sv=2026-02-06&spr=https&st=2026-10-30T11%3A02%3A11Z&se=2026-10-30T12%3A02%3A11Z&sr=c&sp=r&sig=oDMYAsgaNKMFYlxxHiEBqmt%2B9qvgmMcbWQrOiclXh68%3D)

![Subform data populated in the PDF report table using instance numbers](https://cdn.document360.io/dd260e4e-10bb-4b66-8fb3-5504c272b904/Images/Documentation/360095671532?sv=2026-02-06&spr=https&st=2026-10-30T11%3A02%3A11Z&se=2026-10-30T12%3A02%3A11Z&sr=c&sp=r&sig=oDMYAsgaNKMFYlxxHiEBqmt%2B9qvgmMcbWQrOiclXh68%3D)