Windows 10 for R命令行编辑器上的Meta Key

Question

我使用的是Windows 10.

> sessionInfo()
R version 3.4.2 (2017-09-28)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 10 x64 (build 15063)

Matrix products: default

locale:
[1] LC_COLLATE=English_India.1252  LC_CTYPE=English_India.1252   
[3] LC_MONETARY=English_India.1252 LC_NUMERIC=C                  
[5] LC_TIME=English_India.1252    

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

loaded via a namespace (and not attached):
[1] compiler_3.4.2

以下是R命令行编辑器的光标的水平运动。我能够实现下面有C's的那个，C表示Control密钥，M表示Meta密钥。

  C-a Go to the beginning of the command.
  C-e Go to the end of the line.
  M-b Go back one word.
  M-f Go forward one word.
  C-b Go back one character.
  C-f Go forward one character.

我尝试按Esc b而Esc没有成功，也尝试了其他按键..

如何实现快捷方式M-b和M-f以返回一个单词并前进一个单词。