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 ܩܠܒܐ:Test that you have saved as "ܡܦܠܚܢܐ:Foo/ܣܢܕܘܩܐ ܕܚܠܐ/ܩܠܒܐ:Test", use "ܡܦܠܚܢܐ:Foo/ܣܢܕܘܩܐ ܕܚܠܐ" as the prefix.
