Fix typo
diff --git a/README.md b/README.md
index 0086e02..188252c 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@
- [Appearance and Style](#appearance-and-style)
- [Slide Transitions](#slide-transitions)
- [Slide Backgrounds](#slide-backgrounds)
-- [2-D Presenations](#d-presenations)
+- [2-D Presentations](#d-presentations)
- [Reveal Options](#reveal-options)
- [Figure Options](#figure-options)
- [MathJax Equations](#mathjax-equations)
@@ -188,7 +188,7 @@
Backgrounds transition using a fade animation by default. This can be changed to a linear sliding transition by specifying the `background-transition: slide`. Alternatively you can set data-background-transition on any slide with a background to override that specific transition.
-2-D Presenations
+2-D Presentations
----------------
You can use the `slide_level` option to specify which level of heading will be used to denote individual slides. If `slide_level` is 2 (the default), a two-dimensional layout will be produced, with level 1 headers building horizontally and level 2 headers building vertically. For example: