Hi Dually,
If you start with New Listing Page, hit Select Template under the images selection area (you need pop-up blocker off). In the new window, under Select Templates in the upper left, select Custom. Your new custom template should be there (there will be no thumbnail for your custom template). Hit Select and then click Save Template to Listing and you should be good. If you want to change to the new template on a saved listing, click Choose Different Template on that listing and follow the above info.
Doug
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