Merge Xmind Files
Xmind enables the consolidation of various mind maps into a single file, allowing for the integration of diverse ideas. It facilitates the combination of multiple .xmind files, either into the same sheet for unified viewing or into separate sheets, effectively creating a comprehensive map.
Merge into Multiple Sheets
Click Tools and then Merge Xmind Files in the menu bar.

Select Multiple Sheets, click Choose to select the files you want to merge. Tick Generate a Map of Content, and the central topic of other maps will become the branch topic of the map. And the links to the maps will be automatically generated.

Shortcut to undo this operation.
Windows:Ctrl + Z
Mac:⌘ + Z
Merge into Current Map
Merge multiple .xmind files into the current Map, and the central topic in these files will become a branch topic in the current map.
Click Tools and then Merge Xmind Files in the menu bar.

Select Current Map, click Choose to select the files you want to merge.
Shortcut to undo this operation.
Windows:Ctrl + Z
Mac:⌘ + Z