"Lay it out" is a commonly used phrase, but there are several alternate expressions that can convey a similar meaning. For example, "spell it out," "make it clear," or "explain in detail" can all be used to request more information or clarification. "Outline" can be substituted to indicate the need for a more structured explanation. Other synonyms include "present," "disclose," and "reveal" depending on the context. It's important to understand the nuance of each synonym and choose the one that best fits the situation. But whatever phrasing you choose, the goal is always the same: to communicate clearly and effectively.