One emphasis I would like to add is that this is true of submissions: If you are asking for advice, proofreading, or even sending before discussion at an event you are speaking at, send it in .doc/.docx format. I learned this tough rule during my master's when a PhD candidate gave me his suggestions after a presentation. Apparently some superstar philosophers might mark up your document and send it back to you iff it is more accessible and not an inconvenience to do so.