From Online Manual
This is a early draft of Curve2's documentation. This is not an official documentation created by SMF team. Attention to readers: This page and/or the pages/files listed under this page are not for the functions (ie; how to add a new membergroup etc.) of the software or core mechanics (ie; how calendar queries work etc.), this page is for Theme authors or people who is interested in parts of the SMF's front-end.
Curve2 is the default theme of SMF 2.1. Its hold under Themes folder as "default" (From this moment I might call the folder/theme as default and/or Curve2. This folder contains everything related to front end and following list contains files/folders under it;