---
sourceDocument: Brazil IT Service Management
sourceDocumentLink: https://www.servicenow.com/docs/r/it-service-management

 Release :

    - brazil

ft:locale :

    - en-US

ft:publication_title :

    - Brazil IT Service Management

ft:clusterId :

    - itsm

bundleId :

    - itsm

workflow :

    - Technology


---

# Set the lockdown preview maximum

# Set the lockdown preview maximum {#ariaid-title1}

Release version: Brazil  
Updated September 10, 2026  
![](https://www.servicenow.com/docs/portal-asset/ico-clock) 1 minute to read  
Change the maximum number of records that a change lockdown preview displays. This keeps the preview readable on instances with a large volume of change requests.

## Before you begin

Role required: sn_change_admin

## About this task

A lockdown with broad conditions can match more change requests than the preview dialog can display. The preview maximum controls how many records the dialog lists. The limit applies to the preview only. Every matched change
request is placed on hold when the lockdown is enforced.

## Procedure

1. Navigate to AllSystem PropertiesSystem Properties.
2. Search for <kbd class="ph userinput">com.snc.change_management.lockdown.preview.max_changes</kbd>.  
   The property is described as the maximum number of `change_request` records to display, belongs to the Global application, and is delivered with the value
   `1000`.
3. In the Value field, enter the maximum number of records to display.  
   To see every matched change request in the preview, enter a number that is at least as large as the number of matching records.
4. Save the property.

## What to do next

Preview a lockdown again to confirm the number of records that the dialog now lists. For more information, see [Manage a change lockdown](https://www.servicenow.com/docs/XoNDL7HWJesryNg5cAgbIA "Manage a change lockdown by previewing affected change requests, submitting for approval, reverting to draft, or canceling it.").
**Related concepts**   

* [Change lockdown](https://www.servicenow.com/docs/_FlwAKV4BLQWcpGJZX079Q "Change lockdown allows change managers to pause all or a subset of in-flight change requests. Use it during major unplanned IT, critical, or financial events.")  
**Related tasks**   

* [Manage a change lockdown](https://www.servicenow.com/docs/XoNDL7HWJesryNg5cAgbIA "Manage a change lockdown by previewing affected change requests, submitting for approval, reverting to draft, or canceling it.")

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