Just want to clarify... When you say "Alphabetize subject lines", do you mean sorting the topics in alphabetical order? Or do you perhaps mean "capitalize" instead?
Thanks for clarifying your question, Kathleen. The platform currently doesn't support the option to sort a forum with topics in alphabetical order by subject. If this is a featured you'd like to see added, I'd suggest submitting it to our idea exchange:
Even through customization (ie. creating a custom forum page), sorting alphabetically by subject may still be a challenge, especially if the forum has a lot of content. You may want to consider asking for thoughts and feedback in the Customer Connection forum (http://lithosphere.lithium.com/t5/customer-connection/bd-p/customerconnection) to see if you could approach this problem from a different angle. For example, tags or labels might help to better categorize content. Or you could use a TKB to pull out the most valuable information from the forum and structure it in an organized manner.