In magento2, desktop view comes from media point 768. i want to change this view. Rather than 768 my desktop view should start from 992. For that i am overritting the value of @screen__m from 768 to 992. But my changes are not reflecting. What are the other changes which i need to make ? Any solution ?

3 Answers 3


This would not be a good practice to perform changes directly on to core files of Magento. I would suggest you to create your own theme followed by any of the Magento's default theme. For that please follow below steps:

  1. Add your theme under app/design/frontend/{Namesapce}/{theme-name} Below URL would give you proper overview about creating theme in Magento2

URL: http://devdocs.magento.com/guides/v2.0/frontend-dev-guide/themes/theme-create.html

Here you can add your own custom.less file with custom width variable i.e @cutom_desktop_width: 992 and based on that you can write your own required conditions:

.media-width(@extremum, @break) when (@extremum = 'min') and (@break = @screen__m) {
    .example-responsive-block {
        background: #ccf;
    .example-responsive-block:before {
        content: 'Desktop styles ';
        font-weight: bold;

Reference URL : http://magento2-demo.nexcess.net/pub/static/frontend/Magento/blank/en_US/css/docs/responsive.html

  • the suggested approach in the link devdocs.magento.com/guides/v2.0/frontend-dev-guide/themes/… (1) works in developer mode but not in production mode (rage) >:(
    – OZZIE
    Sep 7, 2016 at 9:44
  • it was somehow to do with specificity and the load order of the css, only on tablet the theme was loading before the magento/module files
    – OZZIE
    Sep 7, 2016 at 12:05

If you just need to create a few customer changes, you can add those in a custom.less file, but it seems like you want to do a global change of the site's break points.

Take a look at this page on the Magento 2 Docs that goes over the process of overriding the _responsive.less file. Because all the .less files in the site inherit from this files variable definition, you can define a new break point once and every file that uses that break point will be updated.

You still have to create a theme to house these files, and Akshay Jindal's link will show you how to do that.


the only things you have to do is do it:

  1. Add _theme.less in your theme /app/design/frontend/YourVENDOR/YourTeme/web/css/source/_theme.less

  2. Run grunt clean and grunt exec for republis symlinks to the source files, then run grunt watch for track the changes and compilation CSS

  3. Add @screen__m: 992px; variable in your _theme.less

Good luck! :)

See more on Magento Documentation Grunt

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