"Off the line" can be considered as an antonym for "puts on line". When something is "put on line", it means that it is being made available for public view or scrutiny, typically on the internet or social media. On the other hand, "off the line" means that something is not available for public view or scrutiny. It could signify that something is being kept private, confidential, or restricted to a select few. The phrase "off the line" could apply to many different contexts, such as offline activities, private messaging, or exclusive events. Therefore, "off the line" can be used as an antonym for "puts on line".