When do you use the word manager and when do you use manageress?

Answer 1

Generally, the word manager does not automatically indicate male or female, nor does the word doctor.

The noun 'manageress' is an obsolete word for a manager who is female. The noun manager is a common gender noun, a word for a male or a female who manages.

If, however, manager and manageress are used much like the words actor and actress, the manager or actor would connote male, and manageress and actress would mean female.

In all cases, finally, manager, doctor and actor are all proper when applied to either men or women -- equally.