If you want to share a particular project or file with a public link, you can do so by following the steps below:
First, click on the menu icon on the desired project or file inside the design space. Then, click on the ' Create Link' option in the dropdown menu.
In the modal that opens next, you will have an option to customize the public URL . After customizing, click on 'Create Link'. The 'Reset' option will reset the URL customization to its default value.
You can now share your project/file publicly with this URL. In the last dialog, you have options to copy, edit, delete and view the public link.