One of my extension adds a specific setting for forums. Where should I place this setting? Logically it is on in the forums settings page in the acp. Yes, it has also global settings, and they are placed in a own section under the extension tab, but these are only a part of the settings. It has also a new setting for the users, which is placed in the ucp.
For the administrator installing a extension, it would be necessary to check the extension description and maybe the documentation, if any exists.
For my extension i provide screenshots and descriptions, as many other extension developers also do. Feel free to have a look: https://www.phpbb.com/customise/db/exte ... exif_data/