1. Floating Topic
2. Elements
   1. Topics
      1. [C]entral
      2. [M]ain
      3. Sub[T]opic
      4. [F]loating
   2. Boundary
      1. several topics
      2. in a boundary
   3. Label
   4. Relationship
      1. between two objects
   5. Marker
      1. a marker
      2. another one
   6. Attachment
      1. someone.png
   7. Hyperlink
      1. mindrepo.com
      2. its key binding
   8. Note
   9. Summery
      1. of
      2. several
      3. topics
3. Key Bindings
   1. Obect Creation
      1. Enter
         1. topic after
      2. Shift-Enter
         1. topic before
      3. Tab
         1. subtopic
      4. Ctrl-B
         1. boundary
      5. F3
         1. label
      6. Ctrl-L
         1. relationship
      7. Ctrl-H
         1. hyperlink
      8. F4
         1. note
      9. Ctrl-]
         1. summary
   2. Operations
      1. Ctrl-S/W
         1. save / close
      2. Ctrl-Z/Y
         1. undo / redo
      3. Ctrl-+/-
         1. zoom in / out
      4. F2
         1. edit topic
      5. F6
         1. drill down
      6. Shift-F6
         1. drill up
      7. +/-
         1. extend / collapse
      8. Alt-Up/Down
         1. selected up / down
      9. Ctrl-1/2...6
         1. priority markers
4. Useful Panels
   1. Properties
   2. Outline
   3. Themes
   4. Styles