diff --git a/examples/preprocess.md b/examples/preprocess.md
index e1e84d0..d7d3fde 100755
--- a/examples/preprocess.md
+++ b/examples/preprocess.md
@@ -35,17 +35,48 @@ This content will be passed in as stdin and will be replaced.
 
 ---
 
+
 Any command will work
 
 ~~~echo "You can do whatever, really"
 This doesn't matter, since it will be replaced by the stdout
 of the command above because the command will disregard stdin.
 ~~~
-
 ---
 
+
 You can use this to import snippets of code from other files:
 
 ~~~xargs cat
 examples/import.md
 ~~~
+
+---
+
+
+## More pre-process examples:
+
+### PlantUML
+
+```
+~~~plantuml -utxt -pipe
+@startuml
+A --> B: to
+@enduml
+~~~
+```
+
+The above will be pre-processed to look like:
+
+NOTE: You need `plantuml` installed and in your `$PATH`
+
+```
+┌─┐          ┌─┐
+│A│          │B│
+└┬┘          └┬┘
+ │    to      │
+ │ ─ ─ ─ ─ ─ >│
+┌┴┐          ┌┴┐
+│A│          │B│
+└─┘          └─┘
+