Backendless CRM Blueprint

Hello,
I am trying to find the CRM sidemen in the Backendless UI Builder. I cannot find where I can change the sidemen. Someone said it was all Css, but I have no idea how to find that. I also read a post about making it visible int he editor, but I just cannot understand how to get that to work. Can anyone help me, all I want to do is to find out how to see and change the sidemen on the UI Builder. Surely this should be simple.

Hi. It is not clear, what page/component/object/field do you mean?
Could you, please, describe precisely what the component you are talking about (maybe the link or screenshot)?