You can temporarily share permissions to the Template you are an Owner for.
To share the Template with your teammate(s), open the Manage Templates page and click the ‘Share’ button in the Template row:
Select the users in the ‘Add user’ selector in the ‘Sharing template’ dialog:
Select sharing parameters:
Copy the Template link and click the ‘Save’ button.
Send the link to the users you shared permissions with.
They will get access to the shared functions only with the provided link.
The ‘Apply’ button will directly appear in the ‘Edit Template’ dialog to give the user a shared Apply Template Permission to apply the current Template.
To decline shared Permissions, click the ‘Share’ button in the Template row and click the ‘Bin’ icon in the user row:
Click the ‘Save’ button.