diff --git a/docs/features.md b/docs/features.md
index dfb4f92a..0431f064 100644
--- a/docs/features.md
+++ b/docs/features.md
@@ -22,17 +22,13 @@
   <source src="https://github.com/linrongbin16/lin.nvim/assets/6496887/ac082f93-b60d-452a-a339-bad30a08bca0" type="video/mp4">
 </video>
 
-## Outline Structure and Undotree
+## Outline Structure
 
 <video width="70%" controls>
   <source src="https://github.com/linrongbin16/lin.nvim/assets/6496887/0adf8628-ccba-4082-a4ca-12490fce26b1" type="video/mp4">
 </video>
 
-## Float Terminal
-
-<video width="70%" controls>
-  <source src="https://github.com/linrongbin16/lin.nvim/assets/6496887/ac1a98da-a56f-4396-a938-0c447f57f358" type="video/mp4">
-</video>
+> Warning: The `undotree` feature is not a built-in feature.
 
 ## Tabline/Buffers
 
@@ -40,12 +36,6 @@
   <source src="https://github.com/linrongbin16/lin.nvim/assets/6496887/7fbbb203-7591-4dc6-97b8-eaa21b2172ec" type="video/mp4">
 </video>
 
-## Highlight Words
-
-<video width="70%" controls>
-  <source src="https://github.com/linrongbin16/lin.nvim/assets/6496887/30d12964-ac78-41e8-bb56-2f6f00ae6831" type="video/mp4">
-</video>
-
 ## CSS Color
 
 <img width="70%" alt="image" src="https://github.com/linrongbin16/lin.nvim/assets/6496887/e0df23f8-efe1-44ca-b442-7c177f06cfad">
diff --git a/docs/user_guide/global_key_mappings.md b/docs/user_guide/global_key_mappings.md
index e9a3c8a0..a233f6a5 100644
--- a/docs/user_guide/global_key_mappings.md
+++ b/docs/user_guide/global_key_mappings.md
@@ -22,7 +22,7 @@ And for the **CMD** keys in mac system, key mappings are avoid as well:
 - `CMD-Z`: Undo.
 - ...
 
-> Use `source $VIMRUNTIME/mswin.vim` to enable windows standard keys, `source $VIMRUNTIME/macmap.vim` to enable mac standard keys.
+> You can use `source $VIMRUNTIME/mswin.vim` to enable windows standard keys, `source $VIMRUNTIME/macmap.vim` to enable mac standard keys.
 
 ## Plugin Commands
 
diff --git a/init.lua b/init.lua
index a04b86df..2f562610 100644
--- a/init.lua
+++ b/init.lua
@@ -6,7 +6,7 @@ local stdpath_config = vim.fn.stdpath("config")
 local function vimloader(handle)
   local vimfile = stdpath_config .. string.format("/%s.vim", handle)
   if uv.fs_stat(vimfile) then
-    vim.fn.execute(string.format("source %s", vimfile), true)
+    vim.fn.execute(string.format("source %s", vimfile), "silent!")
   end
 end
 
diff --git a/lua/configs/folke/flash-nvim/keys.lua b/lua/configs/folke/flash-nvim/keys.lua
index e919007f..cd10205f 100644
--- a/lua/configs/folke/flash-nvim/keys.lua
+++ b/lua/configs/folke/flash-nvim/keys.lua
@@ -1,11 +1,24 @@
 local set_lazy_key = require("builtin.utils.keymap").set_lazy_key
 
+-- Always search in 'ignorecase' mode.
 local M = {
   set_lazy_key({ "n", "x", "o" }, "s", function()
+    local gi = vim.go.ignorecase
+    local gs = vim.go.smartcase
+    vim.go.ignorecase = true
+    vim.go.smartcase = false
     require("flash").jump()
+    vim.go.ignorecase = gi
+    vim.go.smartcase = gs
   end, { desc = "Jump" }),
   set_lazy_key({ "o" }, "r", function()
+    local gi = vim.go.ignorecase
+    local gs = vim.go.smartcase
+    vim.go.ignorecase = true
+    vim.go.smartcase = false
     require("flash").remote()
+    vim.go.ignorecase = gi
+    vim.go.smartcase = gs
   end, { desc = "Jump in operator-pending" }),
 }
 
diff --git a/postinit_sample.vim b/postinit_sample.vim
index 79ebd51d..07809664 100644
--- a/postinit_sample.vim
+++ b/postinit_sample.vim
@@ -1 +1,10 @@
 " Please copy this file to 'postinit.vim' to enable it.
+
+" ctrl/cmd-?
+if exists("$VIMRUNTIME/mswin.vim")
+  source $VIMRUNTIME/mswin.vim
+end
+
+if has("mac") && exists("$VIMRUNTIME/macmap.vim")
+  source $VIMRUNTIME/macmap.vim
+end
diff --git a/preinit_sample.vim b/preinit_sample.vim
index 4118becf..d44121bb 100644
--- a/preinit_sample.vim
+++ b/preinit_sample.vim
@@ -1,11 +1,5 @@
 " Please copy this file to 'preinit.vim' to enable it.
 
-" Enable windows standard keys
-" source $VIMRUNTIME/mswin.vim
-
-" Enable mac standard keys
-" source $VIMRUNTIME/macmap.vim
-
 let g:lin_nvim_builtin_constants = {
             \ 'diagnostic': {
             \   'signs': {