There seems to be some interest in customizing the message to users (registered or not) asking their first question ("modal pane"). These first-time questions represent a large proportion of questions asked. StackExchange suggests discussing this on meta before making a formal request.

I am putting a proposal forward for discussion, trying to implement what folks mentioned here. Then, I am splitting up the proposed text into four parts in the answers, allowing for edits and comments (and votes). We will see how well this format works. I have not inserted links into the text yet, so please suggest appropriate links to provide.