# Codes The **Codes** tab is available if you have the Annotation Module. In the **Codes** tab you can create Codes lists with Subjects and Markers. This can be done by Technicians, Administrators and Trainers. [![image.png](https://bookstack.noldus.com/uploads/images/gallery/2023-12/scaled-1680-/LXPh8XRG81Vexmz3-image.png)](https://bookstack.noldus.com/uploads/images/gallery/2023-12/LXPh8XRG81Vexmz3-image.png) Use the codes list to annotate your sessions. See [Annotations](https://bookstack.noldus.com/link/743#bkmrk-page-title)