It’s not enough to want it.You’ve got to ask for it.Amy B. Manning learned that lesson years ago when a superior asked when she wanted to talk about making equity partner and she told him, in so many words, “now.”Mary G. Wilson learned it when she proposed and received approval for a sabbatical shortly after making partner in 2002 — something her firm didn’t specifically offer — to give her time to evaluate the next stage of her career.There are 36 law offices in Chicago with 100 …