> For the complete documentation index, see [llms.txt](https://cortex-docs.paloaltonetworks.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://cortex-docs.paloaltonetworks.com/cortex-agentix/configure-cortex-agentix/cases-and-issues-configuration/customize-issue-fields-and-layouts/issue-fields/create-custom-issue-fields/issue-timer-fields/automate-changes-to-issue-fields-using-timer-scripts.md).

# Automate changes to issue fields using timer scripts

Scripts in Cortex AgentiX enable you to automate processes. You can create scripts that perform specific actions when a timer field times out. Scripts used with timers must have the SLA tag.

You can use an out-of-the-box or custom script and attach it to an timer issue field.

A common use of scripts for timer fields is to send an email when a timer is breached. You can create a custom script that sends an email to specific users when the script is triggered. You can add this to any timer issue field as needed.


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