Documentation for JIRA 4.1. Documentation for other versions of JIRA is available too.

To change the default order from Ascending to Descending so that the latest comments are shown first, follow these steps:

  1. Edit <JIRA_install>/atlassian-jira/WEB-INF/classes/jira-application.properties.
  2. Change jira.issue.actions.order=asc to jira.issue.actions.order=desc
  3. Restart JIRA.