Use Replacement Syntax

General: Using a ! after the $ prevents the variable from being printed if it's empty.

In the templates and the JQL, you can use the following objects:

Object	Usage
`$issue`	`$issue.summary` `$issue.description` `$issue.getReporterUser().getDisplayName()` `$issue.getFixVersions().iterator().next()` `$issue.getIssueTypeObject().getName()` `$issue.getProjectObject().getKey()`
`$customfield_10500 (all customfields)`	`$issue.getCustomFieldValue($customfield_10500)` `$issue.getCustomFieldValue($customfield_10200).getDisplayName()`
`$fieldHelper`	`$fieldHelper.getValueAsString("components")` `$fieldHelper.getValueAsString("fixVersions")` `$fieldHelper.getValueAsString("customfield_10200")` `$fieldHelper.getDateOnlyAsString($issue.created)` `$fieldHelper.getDateWithFormat($issue.created, "yyyy-MM-dd HH:mm")` `$fieldHelper.getDateTimeAsString($issue.getCustomFieldValue($customfield_10500))`
`$projectHelper`	`$projectHelper.getMetadata("my_datum")`
`$customFieldManager`
`$stringUtils`
`$textUtils`
`$currentUser`	The currently logged-in user's username (if available).
`$reporter`	The currently set issue reporter's name (if available). This also works in the issue create dialog and will give the currently selected reporter. In Jira Service Desk, this will give the currently selected user in "Raise this request on behalf of".

If you want to use the issue picker on a create screen, you can only use $issue.getIssueTypeObject().getName() or $issue.getProjectObject().getKey(). All other fields cannot be accessed on a create screen because the issue has not been created yet.

How to get the values of standard fields:

Field	Usage
affectedVersions	`$!fieldHelper.getValueAsString("affectedVersions")`
assignee	`$!fieldHelper.getValueAsString("assignee")`
components	`$!fieldHelper.getValueAsString("components")`
created	`$!fieldHelper.getValueAsString("created")`
creator	`$!fieldHelper.getValueAsString("creator")`
description	`$!fieldHelper.getValueAsString("description")`
dueDate	`$!fieldHelper.getValueAsString("dueDate")`
environment	`$!fieldHelper.getValueAsString("environment")`
estimate	`$!fieldHelper.getValueAsString("estimate")`
fixVersions	`$!fieldHelper.getValueAsString("fixVersions")`
id	`$!fieldHelper.getValueAsString("id")`
issueType	`$!fieldHelper.getValueAsString("issueType")`
key	`$!fieldHelper.getValueAsString("key")`
labels	`$!fieldHelper.getValueAsString("labels")`
originalEstimate	`$!fieldHelper.getValueAsString("originalEstimate")`
priority	`$!fieldHelper.getValueAsString("priority")`
project	`$!fieldHelper.getValueAsString("project")`
reporter	`$!fieldHelper.getValueAsString("reporter")`
resolution	`$!fieldHelper.getValueAsString("resolution")`
resolutionDate	`$!fieldHelper.getValueAsString("resolutionDate")`
securityLevel	`$!fieldHelper.getValueAsString("securityLevel")`
status	`$!fieldHelper.getValueAsString("status")`
summary	`$!fieldHelper.getValueAsString("summary")`
timeSpent	`$!fieldHelper.getValueAsString("timeSpent")`
updated	`$!fieldHelper.getValueAsString("updated")`
votes	`$!fieldHelper.getValueAsString("votes")`
watches	`$!fieldHelper.getValueAsString("watches")`