You can choose a set of templates saved in your sandbox space by using an appropriate sandbox prefix. For example, if you want to preview a version of ແມ່ແບບ:Test that you have saved as "ຜູ້ໃຊ້:Foo/sandbox/ແມ່ແບບ:Test", use "ຜູ້ໃຊ້:Foo/sandbox" as the prefix.