Can we Rename The System Feild Like Company or Zip Code?
Idealy we can not Rename the System feild but we can do it by tweeking some coding:-
Renaming System Fields:- Setup -> Customization -> Translation
1- https://help.zoho.com/portal/en/kb/crm/customize-crm-account/translations/articles/translations?crmprod=1#Step_1_Switch_On_the_Translation_Settings
2 - https://www.youtube.com/watch?v=g91f3DmJNgA
How can you create a user lookup?
Yes, Choose the User feild to create a user lookup
Can you hide the Email opt out field from view if you don’t want to display it?
Yes
Setup > Customization > Modules and Fields. -» Select Specific Module -» Three Dots -» Show or Hide