This two minute video will show how the following short cut keys work.
Fit map to screen
Centre focused topic
Hide all except topic branch in focus
Centre map and collapse all topics
Toggle Level of Detail
F11 or Ctrl-T
Open or Close the Notes Pane
Use Ctrl-Shft-PgDn to move to next note
Use Ctrl-Shft-PguP to move to previous note
I regularly use these in presentations.
Do you have any other favourites?