1) From the profile dropdown click My Data.

2) Click Dataverses.

3) Click on the dataverse you would like to create a template for.

4) Click Edit, then click Dataset Templates.

5) In the top right corner, click Create Dataset Template.

6) Name your Template, then edit the Metadata to your preference. Finally, click Save + Add Terms.

Outcome

You will have created a dataset template in your dataverse.