These merge codes can be used in Custom HTML but also in individual articles, categories, etc. See usage notes:
Template Merge Code | Description | Usage |
[template("object-id")] | The "object-id" merge code can be used in articles and categories and will pull the ID of that article or category. Generally this is most useful in API snippets or for advanced logic that depends on a particular ID being present. | Can be used in Custom HTML > Article and in individual articles and categories. Adding it to other pages will cause a silent failure. Doesn't work in snippets. |