You can now create your own read only Templates for use by your team and organization. You can find your templates under the My Templates option with the star next to it in the side menu in your dashboard.
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To add new Templates for your organization, you can click on a slide you would like to save as a Template, then click Manage. From there you can find the option to Save to Templates. Your new Template will then show up under the My Templates section to be used by your team. Saving a slide as a Template is included in the Premium and Enterprise plans.