diff --git a/data/core/commands/core.lua b/data/core/commands/core.lua
index 701ffd0b..cf904ccf 100644
--- a/data/core/commands/core.lua
+++ b/data/core/commands/core.lua
@@ -102,7 +102,15 @@ command.add(nil, {
   end,
 
   ["core:open-user-module"] = function()
-    core.root_view:open_doc(core.open_doc(USERDIR .. "/init.lua"))
+    local user_module_doc = core.open_doc(USERDIR .. "/init.lua")
+    if not user_module_doc then return end
+    local doc_save = user_module_doc.save
+    user_module_doc.save = function(self)
+      doc_save(self)
+      core.reload_module("core.style")
+      core.load_user_directory()
+    end
+    core.root_view:open_doc(user_module_doc)
   end,
 
   ["core:open-project-module"] = function()
@@ -116,8 +124,8 @@ command.add(nil, {
     end
   end,
 
-  ["core:open-folder"] = function()
-    core.command_view:enter("Open Folder", function(text)
+  ["core:change-project-folder"] = function()
+    core.command_view:enter("Change Project Folder", function(text)
       local path_stat = system.get_file_info(text)
       if not path_stat or path_stat.type ~= 'dir' then
         core.error("Cannot open folder %q", text)
@@ -130,4 +138,17 @@ command.add(nil, {
       return text == "" and core.recent_projects or common.dir_path_suggest(text)
     end)
   end,
+
+  ["core:open-project-folder"] = function()
+    core.command_view:enter("Open Project", function(text)
+      local path_stat = system.get_file_info(text)
+      if not path_stat or path_stat.type ~= 'dir' then
+        core.error("Cannot open folder %q", text)
+        return
+      end
+      system.exec(string.format("%q %q", EXEFILE, text))
+    end, function(text)
+      return text == "" and core.recent_projects or common.dir_path_suggest(text)
+    end)
+  end,
 })
diff --git a/data/core/init.lua b/data/core/init.lua
index c3e40e53..0f20576f 100644
--- a/data/core/init.lua
+++ b/data/core/init.lua
@@ -166,33 +166,46 @@ local function write_user_init_file(init_filename)
   init_file:write([[
 -- put user settings here
 -- this module will be loaded after everything else when the application starts
+-- it will be automatically reloaded when use save it
 
 local keymap = require "core.keymap"
 local config = require "core.config"
 local style = require "core.style"
 
 -- light theme:
--- require "colors.summer"
+-- style.load("colors.summer")
 
 -- key binding:
 -- keymap.add { ["ctrl+escape"] = "core:quit" }
+
+-- customize fonts:
+-- style.font = renderer.font.load(DATADIR .. "/fonts/font.ttf", 14 * SCALE)
+-- style.code_font = renderer.font.load(DATADIR .. "/fonts/monospace.ttf", 13.5 * SCALE)
+--
+-- fonts used by the editor:
+-- style.font      : user interface
+-- style.big_font  : big text in welcome screen
+-- style.icon_font : icons
+-- style.code_font : code
 ]])
   init_file:close()
 end
 
 
 
-local function load_user_directory()
-  local init_filename = USERDIR .. "/init.lua"
-  local stat_info_dir = system.get_file_info(USERDIR)
-  if not stat_info_dir then
-    create_user_directory()
-  end
-  local stat_info_file = system.get_file_info(init_filename)
-  if not stat_info_file then
-    write_user_init_file(init_filename)
-  end
-  return dofile(init_filename)
+function core.load_user_directory()
+  return core.try(function()
+    local stat_dir = system.get_file_info(USERDIR)
+    if not stat_dir then
+      create_user_directory()
+    end
+    local init_filename = USERDIR .. "/init.lua"
+    local stat_file = system.get_file_info(init_filename)
+    if not stat_file then
+      write_user_init_file(init_filename)
+    end
+    dofile(init_filename)
+  end)
 end
 
 
@@ -242,7 +255,7 @@ function core.init()
   core.project_scan_thread_id = core.add_thread(project_scan_thread)
   command.add_defaults()
   local got_plugin_error = not core.load_plugins()
-  local got_user_error = not core.try(load_user_directory)
+  local got_user_error = not core.load_user_directory()
 
   do
     local pdir, pname = system.absolute_path(project_dir):match("(.*)[/\\\\](.*)")
diff --git a/data/core/keymap.lua b/data/core/keymap.lua
index 5c715def..3798d4da 100644
--- a/data/core/keymap.lua
+++ b/data/core/keymap.lua
@@ -88,6 +88,8 @@ keymap.add {
   ["ctrl+p"] = "core:find-file",
   ["ctrl+o"] = "core:open-file",
   ["ctrl+n"] = "core:new-doc",
+  ["ctrl+shift+c"] = "core:change-project-folder",
+  ["ctrl+shift+o"] = "core:open-project-folder",
   ["alt+return"] = "core:toggle-fullscreen",
 
   ["alt+shift+j"] = "root:split-left",
@@ -181,7 +183,6 @@ keymap.add {
   ["ctrl+shift+end"] = "doc:select-to-end-of-doc",
   ["shift+pageup"] = "doc:select-to-previous-page",
   ["shift+pagedown"] = "doc:select-to-next-page",
-  ["ctrl+shift+o"] = "core:open-folder",
 }
 
 return keymap
diff --git a/data/core/rootview.lua b/data/core/rootview.lua
index 834e96c4..f311b11d 100644
--- a/data/core/rootview.lua
+++ b/data/core/rootview.lua
@@ -19,7 +19,8 @@ local function draw_text(x, y, color)
   local lines = {
     { fmt = "%s to run a command", cmd = "core:find-command" },
     { fmt = "%s to open a file from the project", cmd = "core:find-file" },
-    { fmt = "%s to change project folder", cmd = "core:open-folder" },
+    { fmt = "%s to change project folder", cmd = "core:change-project-folder" },
+    { fmt = "%s to open a project folder", cmd = "core:open-project-folder" },
   }
   th = style.font:get_height()
   y = y + (dh - (th + style.padding.y) * #lines) / 2
diff --git a/data/core/style.lua b/data/core/style.lua
index e8567de5..e87a8ff6 100644
--- a/data/core/style.lua
+++ b/data/core/style.lua
@@ -53,4 +53,10 @@ style.syntax["string"] = { common.color "#f7c95c" }
 style.syntax["operator"] = { common.color "#93DDFA" }
 style.syntax["function"] = { common.color "#93DDFA" }
 
+
+style.load = function(module_name)
+  package.loaded[module_name] = nil
+  require(module_name)
+end
+
 return style
diff --git a/data/user/init.lua b/data/user/init.lua
index bb7f4b3f..b72bab26 100644
--- a/data/user/init.lua
+++ b/data/user/init.lua
@@ -1,13 +1,24 @@
 -- put user settings here
 -- this module will be loaded after everything else when the application starts
+-- it will be automatically reloaded when use save it
 
 local keymap = require "core.keymap"
 local config = require "core.config"
 local style = require "core.style"
 
 -- light theme:
--- require "colors.summer"
+-- style.load("colors.summer")
 
 -- key binding:
 -- keymap.add { ["ctrl+escape"] = "core:quit" }
 
+-- customize fonts:
+-- style.font = renderer.font.load(DATADIR .. "/fonts/font.ttf", 14 * SCALE)
+-- style.code_font = renderer.font.load(DATADIR .. "/fonts/monospace.ttf", 13.5 * SCALE)
+--
+-- fonts used by the editor:
+-- style.font      : user interface
+-- style.big_font  : big text in welcome screen
+-- style.icon_font : icons
+-- style.code_font : code
+