Documentation for JIRA 5.2. Documentation for other versions of JIRA is available too. 
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JIRA has a small number of commonly edited advanced configuration options, which are stored in the JIRA database. These options can be accessed and edited from the Advanced Settings page. You must be a JIRA System Administrator to do this.
To access and edit options on the 'Advanced Settings' page:
Edit the value of a Key/Property by clicking its value on the right of the page and modifying the existing value.
Refer to the following Topics for more information about the Keys (above):
Key | Topic |
|---|---|
| jira.attachments.number.of.zip.entries | Configuring the number of files shown in the content of ZIP-format files on issues |
| jira.clone.prefix | Configuring the cloned issue summary field prefix |
jira.date.picker.java.format | Configuring date picker formats |
| jira.issue.actions.order | Changing the Default Order for Comments from Ascending to Descending |
| jira.projectkey.pattern | Configuring Project Keys |
| jira.table.cols.subtasks | Configuring sub-task fields displayed on parent issues |
| jira.view.issue.links.sort.order | Configuring the order of linked issues displayed on the 'view issue' page |
There are a handful of other advanced configuration options (which are of little interest to most JIRA system administrators) whose default values can be customised in the jira-config.properties file located in the JIRA Home Directory, which you may want to edit. For details, please see Advanced JIRA configuration.