When you say template, do you mean a custom project template of the configuration (eg. workflows, fields, etc) to use during project creation?
If yes, it's not possible to add a new template into the project creation screen - but you can choose to share configuration with a pre-existing project.
As a Jira Admin:
^ This way, you can reuse the same workflows, screens, etc from one project to another. Your first project could be the "template".
Note: This is not available with the Free version of Jira.
Let us know if this isn't what you meant so we can assist further :)
I have multiple projects that use variations of the same base workflow. The variations depend on the requirements of the project or issue type. The variations mostly come in the form of new statuses ...
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