diff --git a/SUPPORTED_HARDWARE.org b/SUPPORTED_HARDWARE.org
index 1439592..93b1df0 100644
--- a/SUPPORTED_HARDWARE.org
+++ b/SUPPORTED_HARDWARE.org
@@ -20,6 +20,8 @@ Supported hardware is divided into categories (in order, if applicable):
 
 ** ARM
 *** Atmel SAM
+<details>
+<summary>SAMD21</summary>
 #+begin_md
 | MCU         | Create Project | Run Project | Debug Project | HPL Support | HAL Support |
 |-------------+----------------+-------------+---------------+-------------+-------------|