I'd be lost if I didn't know how to use templates in Photoshop. My goto ones usually come from Katie Pertiet from Designer Digitals. Quality plus. And I'm forever thankful for taking part in a Jessica Sprague Frame Ups online class eons ago that started me on the path to learning about masks, clipping and templates. Multiple photo layouts are a snap while preserving a lot of white space.
We are having Christmas with these guys at their home and will probably spend the majority of the day in their lovely pool. Bring it on.