Cursor:    ^n j next row          ^p k prev. row    ESC ^g erase cmd
           f l fwd col [4;43H     ^b h back col     ^l ^r redraw screen
           0 col A                $ last col        g goto
           ^ row 0                # last row

Cell:      " < > enter label      = enter value     x clear cell
           c copy cell            m mark cell       ^t line 1 on/off
           ^a type value          ^e type expr.     ^v type vbl name
Row, Col:  ar ac dup              ir ic insert      sr sc show
           dr dc delete           zr zc hide        pr pc pull
           vr vc value only       f format
Region:    /c copy                /x clear          /f fill
File:     G get database          M merge database  T write tbl fmt
          P put database          W write listing
Misc:     Q q quit [16;45H        pm pull (merge)
Expr:     +-*/^ arithmetic        ?e:e conditional   & | booleans
          < = > relations         <= >= relations      != relations
          @sum(v1:v2)             @avg(v1:v2)       @prod(v1:v2)
          @func(e) - lots of other math functions