Maye some form of LaTeX conditional (\newif), which you then pass as a Custom option in Documents->Settings?
el On 22/02/2018 22:05, Joel Kulesza wrote: > On Thu, Feb 22, 2018 at 12:52 PM, Daniel Gómez Martínez > <dangome...@gmail.com> wrote: > > Hello everyone, > > I have large sections of customized TeX code in the LaTeX preamble > of some LyX templates I've created over time. I would like to know > if there's a way to quickly toggle between commented and uncommented > line for a given selection of lines (say, with a keyboard shortcut) > > > I don't know of a way to do this. > > > , and in case there's not a quick way to do this, I would like to > ask the developers if they can include this feature in > Settings->Document->LaTeX Preamble and in the TeX code environment > > > I would be happy to see this also. > > > (the one you have with Ctrl+L), it would also be great if a message > of how to do so (toggle comment lines keyboard shortcut) could be > included in the Settings->Document->LaTeX Preamble sub-window. > > I'm sure I've read somewhere that LyX tries to the highest extent to > be so complete that users don't usually have to put TeX or Preamble > code lines, but as we users have some really customized and variable > needs > > > The approach I use is to write a separate, external, preamble.tex file > that I then put alongside the .lyx file and in LyX's premable I issue > "\input{preamble.tex}". Then, I can (un)comment the contained behavior > in one line. Naturally, one can use multiple preamble files to > segregate behaviors. Using this approach also allows multiple documents > to share a common preamble. Further, by symbolically linking the .tex > file, an update in one instance updates behaviors globally. > > - Joel