Can I create my own LaTeX templates?

Yes you can! If you'd like to use a particular project as a private template (i.e., for your own use only), you can create new copies of your project—see the article Copying a project for instructions on how to do that.

On the other hand, if you would like to publicly share your custom template with the wider community, you can upload it as a project on Overleaf, and submit it to the Overleaf Gallery. Our help article Publishing templates and examples in the Overleaf Gallery has a short video showing how to do that, together with advice on:

• Other ways to share templates, examples and completed works
• What isn't suitable for publishing in the Gallery?