diff --git a/src/xrt/auxiliary/util/u_distortion.h b/src/xrt/auxiliary/util/u_distortion.h
index 233552b53..717084d8b 100644
--- a/src/xrt/auxiliary/util/u_distortion.h
+++ b/src/xrt/auxiliary/util/u_distortion.h
@@ -20,7 +20,7 @@ extern "C" {
 struct xrt_hmd_parts;
 
 /*!
- * @defgroup aux_distortion Distortion utilities.
+ * @defgroup aux_distortion Distortion utilities
  * @ingroup aux_util
  */
 
diff --git a/src/xrt/auxiliary/util/u_logging.h b/src/xrt/auxiliary/util/u_logging.h
index 5a02daac3..16a544f8d 100644
--- a/src/xrt/auxiliary/util/u_logging.h
+++ b/src/xrt/auxiliary/util/u_logging.h
@@ -24,7 +24,7 @@ struct xrt_device;
 
 
 /*!
- * @defgroup aux_log Logging functions.
+ * @defgroup aux_log Logging functions
  * @ingroup aux_util
  */
 
diff --git a/src/xrt/auxiliary/util/u_pretty_print.h b/src/xrt/auxiliary/util/u_pretty_print.h
index 28f1447c8..f297e58aa 100644
--- a/src/xrt/auxiliary/util/u_pretty_print.h
+++ b/src/xrt/auxiliary/util/u_pretty_print.h
@@ -16,10 +16,11 @@ extern "C" {
 
 
 /*!
- * @defgroup aux_pretty Pretty printing functions.
+ * @defgroup aux_pretty Pretty printing functions and helpers
+ * @ingroup aux_util
  *
- * Multiple modules implement additional pretty printing functions like
- * @ref oxr_api.
+ * This is common functionality used directly and shared by additional pretty
+ * printing functions implemented in multiple modules, such as @ref oxr_api.
  *
  * Some functions have a `_indented` suffix added to them, this means that what
  * they print starts indented, but also they start with a newline. This is so
@@ -29,8 +30,10 @@ extern "C" {
  */
 
 /*!
- * Function prototype for receiving pretty printed strings, do not keep a
- * reference to the pointer as it's often allocated on the stack for speed.
+ * Function prototype for receiving pretty printed strings.
+ *
+ * @note Do not keep a reference to the pointer as it's often allocated on the
+ * stack for speed.
  *
  * @ingroup aux_pretty
  */