diff --git a/README.md b/README.md
index 26c57c0a..6f172ebd 100644
--- a/README.md
+++ b/README.md
@@ -85,9 +85,8 @@ The below features are available via the keyboard shortcuts shown, or via the Co
 |Build		        | (Win)`^B` or `F7`, (OSX) `⌘B` or `F7`   |
 |Error list             | (via Command Palette) |
 
-The "format on key" feature is on by default, which formats the current line after typing `;`, `}` or `enter`.
-To disable it, go to `Preferences` -> `Package Settings` -> `TypeScript` -> `Plugin Settings - User`, and add
-`"typescript_auto_format": false` to the json file.
+The "format on key" feature is disabled by default, which formats the current line after typing `;`, `}` or `enter`.
+To enable it, go to `Preferences` -> `Package Settings` -> `TypeScript` -> `Plugin Settings - User`, and add `"typescript_auto_format": true` to the json file.
 
 For further information about the keyboard shortcuts, please refer to the [`Default.sublime-keymap`](https://github.com/Microsoft/TypeScript-Sublime-Plugin/blob/master/Default.sublime-keymap) file for common shortcuts and
 [`Default (OSX).sublime-keymap`](https://github.com/Microsoft/TypeScript-Sublime-Plugin/blob/master/Default%20(OSX).sublime-keymap),
@@ -95,6 +94,13 @@ For further information about the keyboard shortcuts, please refer to the [`Defa
 [`Default (Linux).sublime-keymap`](https://github.com/Microsoft/TypeScript-Sublime-Plugin/blob/master/Default%20(Linux).sublime-keymap)
 for OS-specific shortcuts.
 
+#### Other settings
+
+These settings can be overridden in `Packages/User/TypeScript.sublime-settings`, which you can open by going to `Preferences` -> `Package Settings` -> `TypeScript` -> `TypeScript Settings - User`.
+
+- `error_color`: the color of the squiggly lines drawn underneath type errors; either an empty string for the default color, or one of `"region.redish"`, `"region.orangish"`, `"region.yellowish"`, `"region.greenish"`, `"region.bluish"`, `"region.purplish"`, `"region.pinkish"`
+- `quick_info_popup_max_width`: the max width of the quick info popup, default 1024
+
 Project System
 ------
 The plugin supports two kinds of projects:
diff --git a/TypeScript.sublime-settings b/TypeScript.sublime-settings
index 6a916275..7666555c 100644
--- a/TypeScript.sublime-settings
+++ b/TypeScript.sublime-settings
@@ -1,5 +1,9 @@
 {
     "auto_complete_triggers" : [ {"selector": "source.ts", "characters": "."} ],
     "use_tab_stops": false,
-    "word_separators": "./\\()\"'-:,.;<>~!@#%^&*|+=[]{}`~?"
+    "word_separators": "./\\()\"'-:,.;<>~!@#%^&*|+=[]{}`~?",
+
+    // empty string, or one of "region.redish", "region.orangish", "region.yellowish", "region.greenish", "region.bluish", "region.purplish", "region.pinkish"
+    "error_color": "",
+    "quick_info_popup_max_width": 1024
 }
diff --git a/typescript/commands/quick_info.py b/typescript/commands/quick_info.py
index 48f1251a..3c999559 100644
--- a/typescript/commands/quick_info.py
+++ b/typescript/commands/quick_info.py
@@ -69,9 +69,10 @@ def handle_quick_info(self, quick_info_resp_dict, display_point):
         if TOOLTIP_SUPPORT and (info_str != "" or doc_str != "" or error_html != ""):
             if self.template is None:
                 self.template = Template(load_quickinfo_and_error_popup_template())
-                
             html = self.get_popup_html(error_html, info_str, doc_str)
-            self.view.show_popup(html, flags=sublime.HIDE_ON_MOUSE_MOVE_AWAY, location=display_point, max_height=300, max_width=1500)
+
+            settings = sublime.load_settings("TypeScript.sublime-settings")
+            self.view.show_popup(html, flags=sublime.HIDE_ON_MOUSE_MOVE_AWAY, location=display_point, max_height=300, max_width=settings.get("quick_info_popup_max_width") or self.view.viewport_extent()[0])
 
     def get_popup_html(self, error, info, doc):
         theme_styles = get_theme_styles(self.view)
diff --git a/typescript/listeners/idle.py b/typescript/listeners/idle.py
index 80850608..5903dc76 100644
--- a/typescript/listeners/idle.py
+++ b/typescript/listeners/idle.py
@@ -161,7 +161,8 @@ def show_errors(self, diagno_event_body, syntactic):
             view.add_regions(region_key, error_regions, "invalid", "",
                              sublime.DRAW_OUTLINED)
         else:
-            view.add_regions(region_key, error_regions, "invalid.illegal", "",
+            settings = sublime.load_settings("TypeScript.sublime-settings")
+            view.add_regions(region_key, error_regions, settings.get("error_color") or "invalid.illegal", "",
                              sublime.DRAW_NO_FILL +
                              sublime.DRAW_NO_OUTLINE +
                              sublime.DRAW_SQUIGGLY_UNDERLINE)