diff --git a/doc/howto.md b/doc/howto.md
index a7208b3..dd13ada 100644
--- a/doc/howto.md
+++ b/doc/howto.md
@@ -9,9 +9,9 @@ This is the step-by-step documentation how to use muxsa.  For an overview on mux
     | slides.pptx | -> | Powerpoint  | -> | muxsa-      | -> | 0000.png,   |
     |             |    | win in KVM  |    | kvm2png     |    | 0001.png, ..|
     +_____/~~~~~~~+    +-------------+    +-------------+    +_____/~~~~~~~+
-                                                                |
-                                             +------------------+
-                                             V
+                                                               |
+                                            +------------------+
+                                            V
                        +-------------+    +-------------+    +-------------+
                 +----> | audio.m4a   | -> | muxsa-      | -> | film.mp4    |
                 |      |             |    | pngaac2mp4  |    |             |