diff --git a/.gitignore b/.gitignore
index 727284679f061af26a8ceeac0749defbc9782213..3266ae733ca08354df88360db9ad97267029773c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -518,6 +518,7 @@ luac.out
 !**/assets/img/*.pdf
 !**/assets/img/*.eps
 **/assets/img/*-eps-converted-to.pdf
+!binding_style.pdf
 # *.ps
 # *.eps
 # *.pdf
diff --git a/binding_style.pdf b/binding_style.pdf
new file mode 100644
index 0000000000000000000000000000000000000000..fcf72a5cb6ad4fe2ec1e119b5c510dc2969fb976
Binary files /dev/null and b/binding_style.pdf differ