Template are a special type of node: only the author of Template can edit it. Other users, however, can create children nodes -- also Templates -- of any Template node. All Template modes grow under the Templates root node.
Templates can be included in any (regular or other Template) node by pressing "T" button of Editor toolbar and selecting desired Template. This does not change the nature of the node that is being edited, as only contents of Template are copied in it.
- Headers for nodes with predefined MathJax macros