The plan is to have the subsections you mentioned, like 'Graphics', 'Sound', 'Files', etc., but there's currently not any articles to put in those sections. As for the how-to's, I think they would probably fit best in the 'Tutorials' section. Of course, don't forget that if you can't find what you're looking for, you can always use the search feature to look for it.
Community project - BlitzMax help files
BlitzMax Forums/BlitzMax Beginners Area/Community project - BlitzMax help filesThe forum is locked. These are the original blitzbasic.com forums, kept so they can still be read. No new topics, replies or edits can be made here. To join in, head over to the Blitz3D+ forums.