diff --git a/doxygen/trigonometric.dox b/doxygen/trigonometric.dox
index 9910642..3fc3863 100644
--- a/doxygen/trigonometric.dox
+++ b/doxygen/trigonometric.dox
@@ -4,5 +4,5 @@
  * @defgroup trigonometric Trigonometric Helper Functions
  * 
  * The trigonometric helper function are used to calculate bounding boxes
- * @warning Code is incomplete. Please double check the functionality!
+ * @warning Code is incomplete. Please double check for functionality!
  */
diff --git a/external-renderer.h b/external-renderer.h
index ecb056b..841b219 100644
--- a/external-renderer.h
+++ b/external-renderer.h
@@ -36,7 +36,8 @@
 
 /**
  * @brief function name expected to be found in external library.
- * @detail The function has to be defined as follows:
+ * 
+ * The function has to be defined as follows:
  * @code
  * int function_name(gds_cell *toplevel, GList *layer_info_list, char *output_file_name)
  * @endcode
diff --git a/tree-renderer/tree-store.h b/tree-renderer/tree-store.h
index e9b60da..02a2ee7 100644
--- a/tree-renderer/tree-store.h
+++ b/tree-renderer/tree-store.h
@@ -40,7 +40,7 @@ enum cell_store_columns {
 	CELL_SEL_CELL_ERROR_STATE, /**< Used for cell color and selectability */
         CELL_SEL_MODDATE,
         CELL_SEL_ACCESSDATE,
-	CELL_SEL_COLUMN_COUNT /**< Not a column. Used to determine count of coumns **/
+	CELL_SEL_COLUMN_COUNT /**< @brief Not a column. Used to determine count of columns */
 };
 
 struct tree_stores {
diff --git a/trigonometric/bounding-box.c b/trigonometric/bounding-box.c
index 9d3b26d..c30541d 100644
--- a/trigonometric/bounding-box.c
+++ b/trigonometric/bounding-box.c
@@ -180,10 +180,11 @@ void bounding_box_update_point(union bounding_box *destination, conv_generic_to_
 }
 
 /**
- * @brief bounding_box_apply_transform
- * @param scale scaling factor
- * @param rotation roation of bounding box around the origin in degrees (counterclockwise)
- * @param box bounding box the operations should be applied to
+ * @brief Apply transformations onto bounding box.
+ * @param scale Scaling factor
+ * @param rotation_deg Roation of bounding box around the origin in degrees (counterclockwise)
+ * @param flip_at_x Flip the boundig box on the x axis before rotating.
+ * @param box Bounding box the operations should be applied to.
  */
 void bounding_box_apply_transform(double scale, double rotation_deg, bool flip_at_x, union bounding_box *box)
 {
diff --git a/trigonometric/cell-trigonometrics.c b/trigonometric/cell-trigonometrics.c
index 7f13d44..4789a46 100644
--- a/trigonometric/cell-trigonometrics.c
+++ b/trigonometric/cell-trigonometrics.c
@@ -38,9 +38,9 @@ static void convert_gds_point_to_2d_vector(struct gds_point *pt, struct vector_2
 }
 
 /**
- * @brief update_box_with_gfx
- * @param box
- * @param gfx_list
+ * @brief Update the given bounding box with the bounding box of a graphics element.
+ * @param box box to update
+ * @param gfx Graphics element
  */
 static void update_box_with_gfx(union bounding_box *box, struct gds_graphics *gfx)
 {