Page Comparison

...

1. To create a new validator, go to Jira Administration > Issues > Workflows.
   
   Image RemovedImage Added
   
   
2. Click Workflows. Click Edit for a Project you'd like to add validator to.
   
   Image RemovedImage Added
   
   
   
3. Select a Diagram view. 
   Image Removed
   Image Added
   
   
4. Select the transition you'd like to add validator to and click it. Configuration panel appears. 
   Select Validators. 
   Image Removed
   Image Added
   
   
5.  Click Add validator.
   
   Image RemovedImage Added
   
6. Select a validator and click Add. 
   Image Removed
   Image Added
   
   
7. Add parameters to validator and click Add.
   Image Removed
   Image Added
   
   
8. To save changes, click Publish Draft.
   Image Removed
   Image Added
   
   
9. That's it. Now the transition requires saved criteria to be valid.

...