This tutorial will show you how to configure features in SMF
The Basic Features page has a variety of different options that are sure to be useful to you. We will point out a few of them.
Choosing a low number of maximum characters allowed in signatures can help prevent unneccessary clutter.
User online time threshold sets the number of inactive minutes before a user is logged out automatically. Note that setting this number very low can provide a lot of frustration when typing up or reading long posts.
6) Click Save to keep your changes.
This concludes the demonstration. You now know how to edit features and options.