
desc: get manual for specific command

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eg: man cd

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----------------------------------------------------------------
  Edit Option                      |                Command
  ----------------------------------------------------------------
  change current dir               |                 cd
  add child dir                    |                 add
  remove child dir                 |                 rm
  copy child dir                   |                 cp
  switch child dir                 |                 sd
  set property                     |                 set
  reset property to default        |                 reset
  ----------------------------------------------------------------     
                        
  -------------------------------------------------------------------------------------------------
  Scene Manage Option                                  |       Command
  --------------------------------------------------------------------------------------------------
  load mesh                                            |          lm
  unload mesh                                          |          um
  play animation                                       |          pa
  stop animation                                       |          sa
  --------------------------------------------------------------------------------------------------
  attatch particle to bone or scene node               |
  attatch material to entity or subentity              |          attatch
  attatch compositor to view port                      |
  --------------------------------------------------------------------------------------------------
  detach  item(particle, material, compositor)         |          detach
  --------------------------------------------------------------------------------------------------
  scene light manage                                   |  set ambient in  \system
                                                       |  light is also a dir, it resides in \system
  --------------------------------------------------------------------------------------------------
  export scene                                         |          es
  load  scene                                          |          ls(only load exported from ose)
  --------------------------------------------------------------------------------------------------



system shortcut list:

tab                 :  get prompt for current typing
ctrl + backspace    :  delete previous word in command line
ctrl + delete       :  delete next word in command line
shift + backspace   :  clean command line
ctrl + left arror   :  move caret to previous word in command line
ctrl + right arror  :  move caret to next word in command line
ctrl + c            :  copy selected text from command line
ctrl + v            :  paste text to command line
ctrl + s            :  save
ctrl + n            :  switch 3dAxes visibility
up arrow            :  previous command
down arrow          :  next command
esc                 :  hide cmd ui or leave system
ctrl + e            :  show cmd ui
ctrl + left mouse button + drag   :  rotate camera
ctrl + mid mouse button scroll    :  zoom
ctrl + right mouse button + drag  :  zoom
ctrl + p            :  colour select window
ctrl + b            :  switch ui background visibility
ctrl + =            :  turn up alpha of ui background
ctrl + -            :  turn down alpha of ui background
ctrl + i            :  attatch/detatch current compositor exclusively
ctrl + u            :  rebuild compositor chain
