Hi @malcolmdomecq ,
Can you please update your post with some more information so we can help you faster? Things like screenshots and your environment info really speed things up.
Posting guidelines can be found here: Posting Guidelines for the Design Help Category - General - Forum | Webflow
Thanks in advance! 
PS - you can add custom jquery in the custom code area. For more information on this, please refer to this article: Custom code in head and body tags | Webflow University