> For the complete documentation index, see [llms.txt](https://docs.langstack.com/welcome/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.langstack.com/welcome/get-started/learn-langstack/using-triggers/after-update-trigger.md).

# After Update Trigger

* To create an After Update Trigger, click the \[+ After Update] button.

![](https://2351945889-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FVoxOh7gdjWdmqooFdYBY%2Fuploads%2FEjiHIuZGnrjvxqznXNFr%2FAfterUpdate.png?alt=media\&token=a0d04987-5266-4dd5-a372-04530a528674)

* When the After Update trigger is created, it has the following two (2) predefined variables:
  1. Variable Name: “Previous\_Revision”, Data Type: (the entity where the trigger is created). This variable contains the value of the entity record before the update.
  2. Variable Name: “Updated\_Record”, Data Type: (the entity where the trigger is created) This variable contains the value of the entity record after the update.

![](https://2351945889-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FVoxOh7gdjWdmqooFdYBY%2Fuploads%2FMTELX21sqTNl2AdTyyWD%2FAfter_Update_Variables.png?alt=media\&token=c119bc47-d649-4d43-8b7c-598bb1c2483b)