add usage note in readme

Fixes #93

1 files changed, 6 insertions, 0 deletions

diff --git a/README.md b/README.md
index 4f8a057..b8d61fa 100644
--- a/README.md
+++ b/README.md
@@ -47,6 +47,12 @@ or download the latest release from [github](https://github.com/icewind1991/file
 
 If you're installing from git, you'll need to build the project by running `make` in the app directory.
 
+
+Usage
+---
+
+To use the markdown editor, simply open a file with a `.md` or `.markdown` extention.
+
 Development
 ---