See example CSS below to hide Custom Classifications or the Attachments toggle. Follow CSS Guidelines to add the CSS to the appropriate CSS field in the Control Panel.
When Expert updated the search experience with an improved Intelligent Search in Q1 of 2020, the current version of the platform received an updated search algorithm and user interface. Previous versions of Expert (MT4) and search integrations receive the updated algorithm without any UI changes.
The Search user interface shows Location, Classification, and Attachments (toggle) in new left filter menu.
Click the ellipses icon below the Category and Guide Filter to expand or collapse the Classification Filter.
Replace [classification-prefix], without brackets, with the exact prefix for the Custom Classification you want to hide. Find the Classification prefix by navigating to Site Tools > Control Panel > System Settings > Classifications and copy the text in parentheses next to the Classification label.
//HIDE CUSTOM CLASSIFICATIONS FROM SEARCH FILTERS .mt-search-filters-classification-[classification-prefix], .mt-search-filters-classification-[classification-prefix], { display: none; }
//HIDE ATTACHMENT TOGGLE FROM SEARCH FILTERS .mt-search-filters-option-attachments { display: none; }