diff --git a/assets/keymaps/atom.json b/assets/keymaps/atom.json
index 91844295b1..078dabd192 100644
--- a/assets/keymaps/atom.json
+++ b/assets/keymaps/atom.json
@@ -25,7 +25,8 @@
       ],
       "ctrl-shift-down": "editor::AddSelectionBelow",
       "ctrl-shift-up": "editor::AddSelectionAbove",
-      "cmd-shift-backspace": "editor::DeleteToBeginningOfLine"
+      "cmd-shift-backspace": "editor::DeleteToBeginningOfLine",
+      "ctrl-shift-m": "markdown::OpenPreviewToTheSide"
     }
   },
   {