In order to change the owner of a data template, click on the checkbox to left of the data template name and click Change Owner. Upon clicking the Change Owner link, a popup will appear that shows all of the users to whom you can assign the selected Data Template to. Once you select a user from the drop-down presented and confirm, that user will become the new owner of the Data Template. Only the owner of the Data Template and the Admin user can perform this.

You can alternatively get to the data template edit screen and then select a user from the Owner drop-down presented below and hit Save.

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