How to create an "alert box" on create issue screen?

[x]

When I create an issue on the STASH tracker and select "bug" issue type, it shows an alert window suggesting to use support instead. What is this feature called, and how can I use it on my own JIRA instance? Specifically, whenever anyone tries to create an issue in the A project I would like to suggest that they probably want the B project instead. I'm constantly moving tickets...

(screenshot has been uploaded to https://support.atlassian.com/browse/JSP-182826)

[darylchuah · Accepted solution]

Hi xavier

This is all you need: https://confluence.atlassian.com/display/ONDEMANDKB/How+To+Add+a+Message+or+Field+on+JIRA+Create+Issue+Screen

[Ricardo Brito]

It saved me: https://docs.atlassian.com/aui/7.9.3/docs/messages.html

Just copy the HTML on field description and configure aui message type

<div class="aui-message aui-message-error">
<p class="title">
<strong>Error!</strong>
</p>
<p>And this is just content in a Default message.</p>
</div>