How do I save something as draft? That’s an option I’ve already missed a lot of times! (So I make my drafts in my text editor and save them on my computer.)
Posts and PMs are automatically saved as drafts as you compose them, and you can even switch devices and continue editing the existing draft if you need to
You will notice a small check mark next to the trash bin while you write (it disappears after a while), which indicates that the draft was saved.
If you close the browser/pwa, the draft post will be readily available next time under your avatar—username—Drafts
You can only have one draft post per topic and one draft topic per category, if I remember correctly.
And be careful if working offline/low connectivity, because older version of the same draft from another online device can overwrite the changes in the offline cache on reconnection.
Flagging is strictly for alerting the moderators that a post is problematic and needs looked at to determine if it breaks the Guidelines.
Sending a message directly to another forum member is the proper way to communicate away from the public topics. Also, directly messaging the moderators is the proper way to alert them of problems you may be having with your own post.