diff --git a/nvim/init.lua b/nvim/init.lua
index 0fa6f10..bdabe8d 100755
--- a/nvim/init.lua
+++ b/nvim/init.lua
@@ -1,4 +1,5 @@
 require("options")
 require("keybinds")
+require("wins")
 require("lazy-conf")
 require("filetypes")
diff --git a/nvim/lua/keybinds.lua b/nvim/lua/keybinds.lua
index c0f3850..fdcf7c4 100755
--- a/nvim/lua/keybinds.lua
+++ b/nvim/lua/keybinds.lua
@@ -3,7 +3,7 @@ local opts = utils.opts
 
 local keymap = vim.keymap
 
-keymap.set({ 'n', 'i', 'v' }, "<C-S-A-i>", function ()
+keymap.set({ "n", "i", "v" }, "<C-S-A-i>", function()
     vim.show_pos()
 end, opts("Show inspect"))
 
@@ -40,8 +40,8 @@ keymap.set("n", "<leader>dd", ":t.<CR>", opts("Duplicate line"))
 
 -- LaTeX mappings
 keymap.set("n", "<leader>lc", utils.run_vim_cmd("VimtexCompile"), opts("Compile latex document")) -- Compile LaTeX file
-keymap.set("n", "<leader>lv", utils.run_vim_cmd("VimtexView"), opts("View compiled latex pdf"))   -- View compiled PDF
-keymap.set("n", "<leader>lq", utils.run_vim_cmd("VimtexStop"), opts("Stop Compiling document"))   -- Stop compilation
+keymap.set("n", "<leader>lv", utils.run_vim_cmd("VimtexView"), opts("View compiled latex pdf")) -- View compiled PDF
+keymap.set("n", "<leader>lq", utils.run_vim_cmd("VimtexStop"), opts("Stop Compiling document")) -- Stop compilation
 
 -- window navigation
 keymap.set("n", "<A-h>", "<C-w>h", opts())
@@ -82,9 +82,18 @@ keymap.set(
 )
 
 -- Migrate from function to const-arrow function (js)
-keymap.set("n", "<leader><leader>fs", ":%s/\\v(async )@<!function (.*) \\((.*)\\)(.*) \\{/const \\2 = (\\3)\\4 => {/g<CR>", opts("Migrate to const-arrow func (sync)"))
-keymap.set("n", "<leader><leader>fa", ":%s/\\vasync function (.*) \\((.*)\\)(.*) \\{/const \\1 = async (\\2)\\3 => {/g<CR>", opts("Migrate to const-arrow func (async)"))
-
+keymap.set(
+    "n",
+    "<leader><leader>fs",
+    ":%s/\\v(async )@<!function (.*) \\((.*)\\)(.*) \\{/const \\2 = (\\3)\\4 => {/g<CR>",
+    opts("Migrate to const-arrow func (sync)")
+)
+keymap.set(
+    "n",
+    "<leader><leader>fa",
+    ":%s/\\vasync function (.*) \\((.*)\\)(.*) \\{/const \\1 = async (\\2)\\3 => {/g<CR>",
+    opts("Migrate to const-arrow func (async)")
+)
 
 -- select all
 keymap.set("n", "<leader>a", "ggVG", opts("select all"))
diff --git a/nvim/lua/plugins/snacks/keys/keys.lua b/nvim/lua/plugins/snacks/keys/keys.lua
index 04f9944..dc00751 100644
--- a/nvim/lua/plugins/snacks/keys/keys.lua
+++ b/nvim/lua/plugins/snacks/keys/keys.lua
@@ -59,7 +59,7 @@ return {
 	},
 	-- Tree
 	{
-		"<leader>e",
+		"<leader>E",
 		function()
 			Snacks.explorer()
 		end,
diff --git a/nvim/lua/plugins/util/diffview.lua b/nvim/lua/plugins/util/diffview.lua
deleted file mode 100644
index e9fd802..0000000
--- a/nvim/lua/plugins/util/diffview.lua
+++ /dev/null
@@ -1,10 +0,0 @@
-return {
-    -- Diffview
-    "sindrets/diffview.nvim",
-    keys = {
-        { "<leader><leader>gdd", ":DiffviewOpen<CR>", desc = "Open diffview" },
-        { "<leader><leader>gdh", ":DiffviewFileHistory<CR>", desc = "View file history" },
-        { "<leader><leader>gdc", ":DiffviewClose<CR>", desc = "Close diffview" },
-        { "<leader><leader>gdr", ":DiffviewRefresh<CR>", desc = "Refresh diffview" },
-    },
-}
diff --git a/nvim/lua/wins.lua b/nvim/lua/wins.lua
new file mode 100644
index 0000000..6e5d95b
--- /dev/null
+++ b/nvim/lua/wins.lua
@@ -0,0 +1,28 @@
+local utils = require("utils")
+local opts = utils.opts
+
+local keymap = vim.keymap
+keymap.set({ "n" }, "<leader>e", function()
+    local width = math.ceil(math.min(150, vim.o.columns * 0.8))
+    local height = math.ceil(math.min(35, vim.o.lines * 0.8))
+    local row = math.ceil(vim.o.lines - height) * 0.5 - 1
+    local col = math.ceil(vim.o.columns - width) * 0.5 - 1
+
+    local float_config = {
+        width = width,
+        height = height,
+        row = row,
+        col = col,
+        relative = "editor",
+        border = "rounded",
+    }
+
+    local buf = vim.api.nvim_create_buf(false, false)
+    vim.api.nvim_open_win(buf, true, float_config)
+    vim.api.nvim_command(":Explore")
+end, opts("Open file browser"))
+
+keymap.set({ "n" }, "<leader>u", function()
+    vim.api.nvim_command(":packadd nvim.undotree")
+    vim.api.nvim_command(":Undotree")
+end, opts("Open file browser"))