diff --git a/config/default.nix b/config/default.nix
index 0651ed8..eb4d76f 100644
--- a/config/default.nix
+++ b/config/default.nix
@@ -9,4 +9,20 @@
     enable = true;
     settings.flavour = "latte";
   };
+
+  globalOpts = {
+    number = true;
+    relativenumber = true;
+
+    signcolumn = "yes";
+
+    # Tab defaults (might get overwritten by an LSP server)
+    tabstop = 4;
+    shiftwidth = 4;
+    softtabstop = 0;
+    expandtab = true;
+    smarttab = true;
+  };
+
+  globals.mapleader = " ";
 }
diff --git a/config/keys.nix b/config/keys.nix
index 1dd514b..9d0261e 100644
--- a/config/keys.nix
+++ b/config/keys.nix
@@ -1,7 +1,12 @@
 {
   keymaps = [
+    # chad tree
     {
       action = "<cmd>CHADopen<cr>";
+      key = "<leader>e";
+      options = {
+        desc = "Open ChadTree";
+      };
     }
   ];
 }