Подскажите по непонятностям FVWM

while true; do man fvwm; done

#-------------------------------------------------------------------------------
#- keys defs
#-------------------------------------------------------------------------------
Key Super_R A     A       Exec exec $[FVWM_MENU] $[FVWM_DATADIR]/mainmenu.xml

Key Left    A     CM      SwitchToPrevDesk
Key Right   A     CM      SwitchToNextDesk

Key Left    WTSF  CS      Move w-1 keep
Key Right   WTSF  CS      Move w+1 keep
Key Up      WTSF  CS      Move keep w-1
Key Down    WTSF  CS      Move keep w+1

Key Left    WTSF  MS      Resize w-1c keep
Key Right   WTSF  MS      Resize w+1c keep
Key Up      WTSF  MS      Resize keep w-1c
Key Down    WTSF  MS      Resize keep w+1c

Key Escape  A   CM  Exec exec xkill

Key Tab     A   M   WindowList Root c c NoDeskSort NoGeometry NoCurrentDeskTitle

Key L       A   CM      Exec exec ixlock
Key B           A       CM      Exec exec $[IX_BROWSER]
Key E           A       CM      Exec exec $[IX_EDITOR]
Key M           A       CM      Exec exec $[IX_MAILER]
Key T           A       CM      Exec exec $[IX_TERMINAL]

Key F2          A       M       Exec exec ixrun

Key F4          WTSF    M       Close
Key F4          WTSF    C       MaximizeCenter
Key F4          WTSF    CS      Minimize
Key F4          R       M       Exec exec ixlogout

Key F11         WTSF    C       Function ToggleMaximized

Key XF86AudioLowerVolume        A A     Exec exec amixer set Master 5%- unmute
Key XF86AudioRaiseVolume        A A     Exec exec amixer set Master 5%+ unmute
Key XF86AudioMute               A A     Exec exec amixer set Master toggle

Key Tab         A       M   FuncFvwmNextWindow
Key Tab         A       SM  FuncFvwmPrevWindow

Key F2           A       M   Exec exec dmenu_run &