Templates

Testing templates
While making a new template or a new revision of an existing template, it is often better to put it in a user subpage (make an article at User: / ) until it is ready and approved. If creating a test page in your userspace, mind the userspace policy.

To test your subpage template creation with actual use, you can post it at the Leonhartopedia Sandbox, just by adding to the page. This will transclude your page as if it was a template, despite not being in the template namespace.

If a template was recently updated, but pages which use it do not update to reflect the change, the specific pages can be forced to update their transcluded pages by hard-refreshing the server. This can be done by clicking the UTC clock in the top of your screen.

And of course, look at existing templates with the features you want. That's probably easiest, and the best starting location since they're more likely to conform to style guidelines.