- <dfn>CD markers</dfn> are locations that are restricted to legal
- <dfn>CD sector boundaries</dfn>. They can be used to add track index
- markers to compact disc images.
+ <dfn>BBT markers</dfn> make it possible to restart the count of bars and
+ beats multiple times in a session.
+ </li>
+ <li>
+ <dfn>Time signature markers</dfn> allow changing the time signature from
+ e.g. 4/4 to 6/8 and then to 3/4 within the same composition.
+ </li>
+ <li>
+ <dfn>Tempo markers</dfn> allow changing tempo within the same composition
+ either abruptly or gradually.
+ </li>
+ <li>
+ <dfn>Range markers</dfn> helps preserving selections (ranges) by storing
+ them in the project and giving them telling names.