Custom Object named "Projects" not visible as subtab on sales Lead standard object details page.
I created a custom object named "projects" and made a relationship between sales lead and it (1:M),
and then add that custom object as a subtab on a sales lead,
and to make it visible on springboard and navigator modified on custom object security,
but at last, these configurations made it visible on Home and navigator not as subtab also.
So what're configurations to make it visible on sales lead as a subtab.