diff --git a/src/atom.coffee b/src/atom.coffee
index f208c3f92..29220206c 100644
--- a/src/atom.coffee
+++ b/src/atom.coffee
@@ -363,7 +363,15 @@ class Atom extends Model
   # a file/folder to open in the new window.
   #
   # options - An {Object} with the following keys:
-  #   :pathsToOpen -  An {Array} of {String} paths to open.
+  #   :pathsToOpen - An {Array} of {String} paths to open.
+  #   :newWindow   - A {Boolean}, true to always open a new window instead of
+  #                  reusing existing windows depending on the paths to open.
+  #   :devMode     - A {Boolean}, true to open the window in development mode.
+  #                  Development mode loads the Atom source from the locally
+  #                  cloned repository and also loads all the packages in
+  #                  ~/.atom/dev/packages
+  #   :safeMode    - A {Boolean}, true to open the window in safe mode. Safe
+  #                  mode prevents installed packages from loading
   open: (options) ->
     ipc.send('open', options)