How can I obfuscate the following on opportunity marketplace (through visual building) ?

Hi all,

I am having difficulties using this new tool 'Visual Builder'. I would like to obfuscate some fields within the Opportunity Marketplace (as we had done for the internal candidate experience, through Page Composer).

I want obfuscate/remove "ORGANIZATION" field.

My client doesn't use the referral feature, so we obfuscate the "Action" tab when an employee is doing an application for an internal job requisition. Now, I need to obfuscate/remove also the "Referred Candidates tabs within the home page inside Opportunity Marketplace.

Thank you all in advance,

Lorenzo