diff --git a/docs/5-debug_link.md b/docs/5-debug_link.md
index 6acec2d5..2cc4cdf5 100644
--- a/docs/5-debug_link.md
+++ b/docs/5-debug_link.md
@@ -62,7 +62,9 @@ make rtplot
 ```
 
 After the rtplot window shows up, select `/dev/pts/Y` port, `test` message then click the connect button.
-The user should expect to see some real-time plotting on the screen.
+The user should expect to see some real-time data plotting on the screen.
+
+![rtplot](./docs/images/rtplot.png)
 
 ### 3. Define debug-link message
 
diff --git a/docs/Doxyfile b/docs/Doxyfile
index 7b679715..a0103b30 100644
--- a/docs/Doxyfile
+++ b/docs/Doxyfile
@@ -1009,7 +1009,7 @@ EXAMPLE_RECURSIVE      = NO
 # that contain images that are to be included in the documentation (see the
 # \image command).
 
-IMAGE_PATH             =
+IMAGE_PATH             = docs/images/
 
 # The INPUT_FILTER tag can be used to specify a program that doxygen should
 # invoke to filter for each input file. Doxygen will invoke the filter program
diff --git a/docs/images/rtplot.png b/docs/images/rtplot.png
new file mode 100644
index 00000000..53cfdfdd
Binary files /dev/null and b/docs/images/rtplot.png differ