Single forms can be exported and imported within the same project (as child forms) or to other projects. You could for example export a child form from an old project and use it as the first form on your new one.
Export a form
To export a form, select the form you would like to export and open the context menu by clicking on the arrow at the top right:
Please remember the form MUST be valid.
Save the file where you prefer. It will be a .json file