I want to highlight selected maths formulas in Lyx.

Is there a simple way of doing this from the GUI ?

I have tried selecting and right-clicking -> Text style , but that seems to change the font colour, not the background colour :

enter image description here

I have also tried the box menu -> shaded highlight, but the highlighting runs all the way across the page for some reason (in the PDF as well as in the Lyx GUI):

enter image description here

I am able to do this by entering Latex code for the highlighting and the formula, but I was hoping this highlighting from the Lyx GUI.

I am using Lyx version 2.2.3 with TexLive.

  • It runs across the whole page because that is the default configuration of a Shaded background box. You can change the width in the settings. Unrelated: when writing ln and exp, use \ln and \exp, then they are properly typeset. May 31, 2018 at 13:49
  • Currently, 'Settings..' says 'minipage'. Do i need to change that to 'parbox' or 'none' ? Also, yes there is a width setting, but do i need to type in (guess) a value ? May 31, 2018 at 14:01
  • No need to change type. As far as I can see, you have set the width manually, yes. At least with that method, I don't know if LyX has any other options built-in. By the way, you said you could do it by writing code. Exactly how did you do it? May 31, 2018 at 14:04
  • I normally use TexStudio rather than Lyx, and I use this: {code} %%highlight with \hl \usepackage{xcolor} \usepackage{soul} \colorlet{highlightgreen}{green!10} \colorlet{highlightgray}{gray!20} \sethlcolor{highlightgreen} {code} then i can use \hl{} with the formula inside May 31, 2018 at 14:09
  • You could use the old trick of writing \hl{ in an ERT, then write the inline math using LyX's GUI, and finally another ERT with }. May 31, 2018 at 14:13

1 Answer 1


A quick hack for using \hl, is to write only \hl{ and } in ERTs, and write the math stuff using the LyX GUI. So it might look like this:

enter image description here

Another option is to define a new custom inset for \hl. Go to Document --> Settings --> Local layout, and add this:

InsetLayout Flex:highlight
    LyxType               custom
    LabelString           hl
    LatexType             command
    LatexName             hl
      Series              Bold
    InToc                 false
    HTMLTag               strong
    ResetsFont true

(Alternatively skip the Preamble block, and add those to the preamble manually.)

Now you should find hightlight under Insert -> Custom insets:

enter image description here

Add one of those insets, and add the inline math inside it. Might look like this:

enter image description here

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.