Where is the specific sheet sharing?

Where is the specific sheet sharing?

Hi

First, my congratulations to Zoho Team for your amazing job.

I know it is not possible to hide rows and columns in a sheet (not implemented yet), but at least I would like to know how to hide a page sheet in a shared sheet (by the way, to hide the vba code is also important to me).  

I searched same thing as " using  specific sheet  sharing" but I don't find this option in sharing menu. Please, show me as how can I limit the visibility of information in a shared sheet.

Sorry my English and t hanks in  advance.