diff --git a/source/rtos/PDK_Platform_Software/IPC/_Use_Cases_for_IPC.rst b/source/rtos/PDK_Platform_Software/IPC/_Use_Cases_for_IPC.rst
index 9313f08e3..ee70a3d22 100644
--- a/source/rtos/PDK_Platform_Software/IPC/_Use_Cases_for_IPC.rst
+++ b/source/rtos/PDK_Platform_Software/IPC/_Use_Cases_for_IPC.rst
@@ -25,6 +25,7 @@ In the following sections, figures show modules used by each scenario.
.. role:: raw-html(raw)
:format: html
+
- :raw-html:`Blue boxes,` identify modules for which your application will call C API functions other than those used to dynamically create objects.
- :raw-html:`Red boxes,` identify modules that require only configuration by your application. Static configuration is performed in an XDCtools configuration script (.cfg). Dynamic configuration is performed in C code.
- :raw-html:`Grey boxes,` identify modules that are used internally but do not need to be configured or have their APIs called.