diff --git a/private_dot_config/niri/config.kdl b/private_dot_config/niri/config.kdl
index e970012..30f5b7b 100644
--- a/private_dot_config/niri/config.kdl
+++ b/private_dot_config/niri/config.kdl
@@ -17,6 +17,9 @@ input {
             // options "grp:win_space_toggle,compose:ralt,ctrl:nocaps"
             layout "fr"
         }
+
+        // Enable numlock on startup, omitting this setting disables it.
+        numlock
     }
 
     // Next sections include libinput settings.
@@ -61,6 +64,13 @@ input {
     focus-follows-mouse max-scroll-amount="50%"
 }
 
+// Disable overview in hot-corners
+gestures {
+  hot-corners {
+    off
+  }
+}
+
 cursor {
     hide-when-typing
     hide-after-inactive-ms 5000
@@ -345,6 +355,9 @@ layout {
         active-color "#ffc87f"
         inactive-color "#505050"
 
+        // Color of the border around windows that request your attention.
+        urgent-color "#9b0000"
+
         // active-gradient from="#ffbb66" to="#ffc880" angle=45 relative-to="workspace-view"
         // inactive-gradient from="#505050" to="#808080" angle=45 relative-to="workspace-view"
     }
@@ -361,7 +374,7 @@ layout {
         // radius. It has to assume that windows have square corners, leading to
         // shadow artifacts inside the CSD rounded corners. This setting fixes
         // those artifacts.
-        // 
+        //
         // However, instead you may want to set prefer-no-csd and/or
         // geometry-corner-radius. Then, niri will know the corner radius and
         // draw the shadow correctly, without having to draw it behind the
@@ -516,12 +529,12 @@ binds {
 
     // Suggested binds for running programs: terminal, app launcher, screen locker.
     //Mod+T { spawn "alacritty"; }
-    Mod+T { spawn "kitty"; }
+    Mod+T hotkey-overlay-title="Open a Terminal: kitty" { spawn "kitty"; }
     Mod+Shift+Return { spawn "kitty"; }
     //Mod+D { spawn "fuzzel"; }
-    Mod+P { spawn "fuzzel"; }
+    Mod+P hotkey-overlay-title="Run an Application: fuzzel" { spawn "fuzzel"; }
     //Mod+G { spawn "bemenu-run"; }
-    Super+Alt+L { spawn "swaylock"; }
+    Super+Alt+L hotkey-overlay-title="Lock the Screen: swaylock" { spawn "swaylock"; }
 
     // You can also use a shell. Do this if you need pipes, multiple commands, etc.
     // Note: the entire command goes as a single argument in the end.
@@ -529,10 +542,21 @@ binds {
 
     // Example volume keys mappings for PipeWire & WirePlumber.
     // The allow-when-locked=true property makes them work even when the session is locked.
-    XF86AudioRaiseVolume allow-when-locked=true { spawn "wpctl" "set-volume" "@DEFAULT_AUDIO_SINK@" "0.1+"; }
-    XF86AudioLowerVolume allow-when-locked=true { spawn "wpctl" "set-volume" "@DEFAULT_AUDIO_SINK@" "0.1-"; }
-    XF86AudioMute        allow-when-locked=true { spawn "wpctl" "set-mute" "@DEFAULT_AUDIO_SINK@" "toggle"; }
-    XF86AudioMicMute     allow-when-locked=true { spawn "wpctl" "set-mute" "@DEFAULT_AUDIO_SOURCE@" "toggle"; }
+    XF86AudioRaiseVolume allow-when-locked=true { spawn-sh "wpctl set-volume @DEFAULT_AUDIO_SINK@ 0.1+"; }
+    XF86AudioLowerVolume allow-when-locked=true { spawn-sh "wpctl set-volume @DEFAULT_AUDIO_SINK@ 0.1-"; }
+    XF86AudioMute        allow-when-locked=true { spawn-sh "wpctl set-mute @DEFAULT_AUDIO_SINK@ toggle"; }
+    XF86AudioMicMute     allow-when-locked=true { spawn-sh "wpctl set-mute @DEFAULT_AUDIO_SOURCE@ toggle"; }
+
+    // Example brightness key mappings for brightnessctl.
+    // You can use regular spawn with multiple arguments too (to avoid going through "sh"),
+    // but you need to manually put each argument in separate "" quotes.
+    XF86MonBrightnessUp allow-when-locked=true { spawn "brightnessctl" "--class=backlight" "set" "+10%"; }
+    XF86MonBrightnessDown allow-when-locked=true { spawn "brightnessctl" "--class=backlight" "set" "10%-"; }
+
+    // Open/close the Overview: a zoomed-out view of workspaces and windows.
+    // You can also move the mouse into the top-left hot corner,
+    // or do a four-finger swipe up on a touchpad.
+    Mod+O repeat=false { toggle-overview; }
 
     Mod+Q { close-window; }
 
@@ -729,6 +753,9 @@ binds {
 
     Mod+C { center-column; }
 
+    // Center all fully visible columns on screen.
+    Mod+Ctrl+C { center-visible-columns; }
+
     // Finer width adjustments.
     // This command can also:
     // * set width in pixels: "1000"