Pass form values to PostPage via URL suffix

There's a related discussion on how to perform passing the parameter using jQuery: https://community.lithium.com/t5/Support-Forum/Pass-form-values-to-PostPage-via-URL-suffix/m-p/299284#M11630

But there is actually a URL parameter  as well which works both on the "New Post" as well as the "Choose Node" experience (and it comes free out of the box):

message-subject=<subject>

appended to the query string of each of these URLs allows you pre-populate the subject line, e.g.

https://community.lithium.com/t5/forums/postpage/board-id/studio?message-subject=New%20test%20subject

or

https://community.lithium.com/t5/forums/postpage/interaction-style/board/choose-node/true/category-id/knowledgeandsupport/board-id/studio?message-subject=New%20support%20question

allows you to have the subject field already filled.

But take the good advice from Wendy_S and really think through the posting user flow:

I know that on the Skype Community this was used for a while on the "Didn't find what you were looking for? Post a new question" flow. If your posting experience can't make it clear that the pre-populated subject line is just a starting point and should be edited by the member, you are likely to end up with many identically named topics. As a result your moderators have to go in and edit the topic titles to keep the board listing relevant.