In Xmind, a Branch refers to a part of a mind map that extends from a central idea or theme. Mind maps in Xmind are visual diagrams that organize information around a central concept, typically depicted at the center of the map. From this central idea, main branches or nodes extend, which represent primary thoughts, tasks, or themes related to the central concept. These main branches can further divide into smaller sub-branches, which detail more specific ideas, data, or tasks.