F1 = Toggle options   F3 = Screen formats    F7 = Sort     F9 = Block
F2 = Promote/Demote   F4 = Hide / Reveal     F8 = Print    F10 = File
^Q = Quick options    ^K = Block & File      ^B = Format   ^L = Next
------------------------- F1 = Toggle options ------------------------
I = Insert/Change      C = Continue margin      D = Decimal/classical
T = Text/Outline       L = Labelled/Continue    H = Helps on/off
------------------------- F2 = Promote/Demote ------------------------
TAB = demote line      CR = promote line       DEL = delete structure
F2-TAB = demote struc. F2-CR = promote struc.  F2-DEL = undel struc.
------------------------- F3 = Screen Format -------------------------
E = right edit col.      S = right screen col.    TAB = tab factor
R = bottom edit row      L = positions  to  indent  per  level
------------------------- F4 = Hide / Reveal -------------------------
D = define depth          C = cont. line        P = parent at top
+ = Incr.  - = Decr.      R = Root to node      N = node at top
------------------------- F8 = Print options -------------------------
 B = print block                           S = print structure

------------------------- F9 = Block options -------------------------
B = begin          C = copy          D = delete      TAB = demote
E = end            V = move                          CR = promote
------------------------- F10 = File options -------------------------
D = Save/C-M       S = Save/Stay     B = Block write    R = Read file
X = Save/DOS       Q = Quit/Toss     F = Struc write    P = Struc prt
------------------------- ^Q = Quick options -------------------------
F = find text        E = top/screen     S = left      R = top/file
A = find/replace     X = bot/screen     D = right     C = bot/file
------------------------- ^K = Block & File --------------------------
D = Save/C-M    S = Save/Stay    R = Read file   B = block    K = end
X = Save/DOS    Q = Quit/Toss    Y = del block   C = copy    V = move
------------------------- ^P = Print options -------------------------
 B = print block                           S = print structure

