Lyx Local Layout, markup for R code in documents

While preparing book manuscript, I found the need to mark code of various styles, R functions, variables, and I needed this to be flexible and fixable later when publisher changed mind on style. Here's the secret recipe.

In Lyx Document Settings

1. In modules, turn on the module "Logical Markup".

Test that out, see what they intend. You can highlight things and with a right click choose a markup style.

2. The existing markup may not suit your needs, but there is a customization route. In Document Settings, there is a thing "Local Layout". In there, put markup that will work with the module. Here is mine

Format 7
InsetLayout CharStyle:Rinput
  LyxType               charstyle
  LabelString           Rinput
  LatexType             command
  LatexName             Rinput
  Font
      Family             Typewriter
  EndFont
  Preamble
      \newcommand*{\Rinput}[1]{{\ttfamily #1}}
  EndPreamble
End

InsetLayout CharStyle:Rfunction
  LyxType               charstyle
  LabelString           Rfunction
  LatexType             command
  LatexName             Rfunction
  Font
      Family             Typewriter
  EndFont
  Preamble
      \newcommand*{\Rfunction}[1]{{\ttfamily #1}}
  EndPreamble
End

InsetLayout CharStyle:Routput
  LyxType               charstyle
  LabelString           Routput
  LatexType             command
  LatexName             Routput
  Font
      Family             Typewriter
  EndFont
  Preamble
      \newcommand*{\Routput}[1]{{\ttfamily #1}}
  EndPreamble
End

After that, right click magic!

Now also working on how to automatic the markup of matrices in latex. Have done it in one document, but will come back here to write.