# Activating custom CSS/HTML

**URL:** <https://meta.discourse.org/t/activating-custom-css-html/163369>\
**Category:** Product Support\
**Created:** [September 8, 2020, 1:49pm UTC](https://meta.discourse.org/t/activating-custom-css-html/163369 "2020-09-08T13:49:19Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![Vaping\_Community](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/vaping_community/32/89248_2.png) [@Vaping\_Community](https://meta.discourse.org/u/Vaping_Community)\
**Post date:** [September 8, 2020, 2:39pm UTC](https://meta.discourse.org/t/activating-custom-css-html/163369/3 "2020-09-08T14:39:21Z")

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> [@lyseoy](#):
>
> I’ve added some custom CSS and HTML.

Where? Custom Theme, default theme?  
Common css / desktop css / mobile css?  
More details on what you have done will be helpful.

Usually you just select a theme `/admin/customize/themes` and do this:

 ![Theme Css](https://global.discourse-cdn.com/meta/original/3X/d/7/d7432df994daec9d9633fd08f50c9a292053e25d.gif)

Once you hit that save button, changes show up pretty much instantly as long as the theme you have edited is active.

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