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 ထာမ်ပလိက်:Test that you have saved as "ညးလွပ်:Foo/sandbox/ထာမ်ပလိက်:Test", use "ညးလွပ်:Foo/sandbox" as the prefix.