The HubSpot Classic CMS has a global CSS file, that applies to all of its pages, called custom.css. In order to make minor edits to your existing custom.css file, please go to Content > Content Settings > CMS File Manager (under HubSpot Classic CMS Options).
- Press OK to the warning prompt.
- Edit your CSS and click Save & Continue Editing to update the file. You can Save Draft, if you aren't ready to make your changes live. You can also access previously saved versions of your CSS file with the Version History dropdown.
- If you do not have a custom.css file in your Classic File Manager, click Site Home > New File. Name the file custom.css.