Option not available for reating Custom Fields at the Lead level, to also create those Fields for Accounts/Contacts/Potentials.

Option not available for reating Custom Fields at the Lead level, to also create those Fields for Accounts/Contacts/Potentials.

" You are given the option, when creating Custom Fields at the Lead level, to also create those Fields for Accounts/Contacts/Potentials. "

Where this option comes, no option is coming when creating a field under new layout.

Please elaborate.