Once you have created a custom template, you need to add it to Jaspersoft Studio in order to use it.
To add a template to Jaspersoft Studio:
|1.||Go to Window > Preferences > Jaspersoft Studio > Templates Locations.|
Template Location Preferences
|2.||Navigate to the directory in which you stored your template.|
When you go to File > New > Jasper Report, your new template appears, along with the default templates.