2. Buttons which are specific to type of the document being edited

The main tool bar also contains buttons which are specific to the type of the document being edited. For example, when a DITA topic is opened in XXE, you'll also find "Toggle i", "Toggle b", "Convert to plain text", etc, buttons.

Such buttons are specified in configuration element tool bar in XMLmind XML Editor - Configuration and Deployment found in an XXE configuration file (".xxe" file).