diff --git a/home/modules/niri.nix b/home/modules/niri.nix
index 77c9614..2772a02 100644
--- a/home/modules/niri.nix
+++ b/home/modules/niri.nix
@@ -1,187 +1,203 @@
 { config, lib, ... }:
 let
-  c = config.theme.colors;
+  c          = config.theme.colors;
+  proportion = toString config.myConfig.niri.defaultColumnProportion;
+  presetWidths = builtins.concatStringsSep "\n        "
+    (map (p: "proportion ${toString p}") config.myConfig.niri.presetColumnWidths);
 in
 {
-  home.file.".config/xdg-desktop-portal/portals.conf".text = ''
-    [preferred]
-    default=gtk
-    org.freedesktop.impl.portal.Screenshot=gnome
-    org.freedesktop.impl.portal.ScreenCast=gnome
-  '';
-  home.file.".config/niri/config.kdl" = {
-    force = true;
-    text = ''
-      config-notification {
-          disable-failed
-      }
+  options.myConfig.niri = {
+    defaultColumnProportion = lib.mkOption {
+      type        = lib.types.float;
+      default     = 0.5;
+      description = "Default column width proportion";
+    };
+    presetColumnWidths = lib.mkOption {
+      type        = lib.types.listOf lib.types.float;
+      default     = [ 0.33333 0.5 0.66667 ];
+      description = "Preset column width proportions";
+    };
+  };
 
-      gestures {
-          hot-corners {
-              off
-          }
-      }
-
-      input {
-          keyboard {
-              xkb { }
-              numlock
-          }
-          touchpad {
-              tap
-              natural-scroll
-          }
-          mouse { }
-          trackpoint { }
-      }
-
-      layout {
-          background-color "transparent"
-          center-focused-column "never"
-          preset-column-widths {
-              proportion 0.33333
-              proportion 0.5
-              proportion 0.66667
-          }
-          default-column-width { proportion 0.5; }
-          border {
-              off
-              width 4
-              active-color   "#707070"
-              inactive-color "#d0d0d0"
-              urgent-color   "${c.red_b}"
-          }
-          shadow {
-              softness 30
-              spread 5
-              offset x=0 y=5
-              color "#0007"
-          }
-          struts { }
-      }
-
-      layer-rule {
-          match namespace="^quickshell$"
-          place-within-backdrop true
-      }
-
-      overview {
-          workspace-shadow {
-              off
-          }
-      }
-
-      environment {
-          XDG_CURRENT_DESKTOP "niri"
-      }
-
-      hotkey-overlay {
-          skip-at-startup
-      }
-
-      prefer-no-csd
-      screenshot-path "~/Pictures/Screenshots/Screenshot from %Y-%m-%d %H-%M-%S.png"
-
-      animations {
-          workspace-switch {
-              spring damping-ratio=0.80 stiffness=523 epsilon=0.0001
-          }
-          window-open {
-              duration-ms 150
-              curve "ease-out-expo"
-          }
-          window-close {
-              duration-ms 150
-              curve "ease-out-quad"
-          }
-          horizontal-view-movement {
-              spring damping-ratio=0.85 stiffness=423 epsilon=0.0001
-          }
-          window-movement {
-              spring damping-ratio=0.75 stiffness=323 epsilon=0.0001
-          }
-          window-resize {
-              spring damping-ratio=0.85 stiffness=423 epsilon=0.0001
-          }
-          config-notification-open-close {
-              spring damping-ratio=0.65 stiffness=923 epsilon=0.001
-          }
-          screenshot-ui-open {
-              duration-ms 200
-              curve "ease-out-quad"
-          }
-          overview-open-close {
-              spring damping-ratio=0.85 stiffness=800 epsilon=0.0001
-          }
-      }
-
-      window-rule {
-          match app-id=r#"^org\.wezfurlong\.wezterm$"#
-          default-column-width {}
-      }
-      window-rule {
-          match app-id=r#"^org\.gnome\."#
-          draw-border-with-background false
-          geometry-corner-radius 12
-          clip-to-geometry true
-      }
-      window-rule {
-          match app-id=r#"^gnome-control-center$"#
-          match app-id=r#"^pavucontrol$"#
-          match app-id=r#"^nm-connection-editor$"#
-          default-column-width { proportion 0.5; }
-          open-floating false
-      }
-      window-rule {
-          match app-id=r#"^gnome-calculator$"#
-          match app-id=r#"^galculator$"#
-          match app-id=r#"^blueman-manager$"#
-          match app-id=r#"^org\.gnome\.Nautilus$"#
-          match app-id=r#"^xdg-desktop-portal$"#
-          open-floating true
-      }
-      window-rule {
-          match app-id=r#"^steam$"# title=r#"^notificationtoasts_\d+_desktop$"#
-          default-floating-position x=10 y=10 relative-to="bottom-right"
-          open-focused false
-      }
-      window-rule {
-          match app-id=r#"^org\.wezfurlong\.wezterm$"#
-          match app-id="Alacritty"
-          match app-id="zen"
-          match app-id="com.mitchellh.ghostty"
-          match app-id="kitty"
-          draw-border-with-background false
-      }
-      window-rule {
-          match app-id=r#"firefox$"# title="^Picture-in-Picture$"
-          match app-id="zoom"
-          open-floating true
-      }
-      window-rule {
-          match app-id=r#"org.quickshell$"#
-          open-floating true
-      }
-
-      recent-windows {
-          binds {
-              Alt+Tab         { next-window scope="output"; }
-              Alt+Shift+Tab   { previous-window scope="output"; }
-              Alt+grave       { next-window filter="app-id"; }
-              Alt+Shift+grave { previous-window filter="app-id"; }
-          }
-      }
-
-      debug {
-          honor-xdg-activation-with-invalid-serial
-      }
-
-      include "dms/colors.kdl"
-      include "dms/layout.kdl"
-      include "dms/alttab.kdl"
-      include "dms/binds.kdl"
-      include "dms/outputs.kdl"
-      include "dms/cursor.kdl"
+  config = {
+    home.file.".config/xdg-desktop-portal/portals.conf".text = ''
+      [preferred]
+      default=gtk
+      org.freedesktop.impl.portal.Screenshot=gnome
+      org.freedesktop.impl.portal.ScreenCast=gnome
     '';
+    home.file.".config/niri/config.kdl" = {
+      force = true;
+      text = ''
+        config-notification {
+            disable-failed
+        }
+
+        gestures {
+            hot-corners {
+                off
+            }
+        }
+
+        input {
+            keyboard {
+                xkb { }
+                numlock
+            }
+            touchpad {
+                tap
+                natural-scroll
+            }
+            mouse { }
+            trackpoint { }
+        }
+
+        layout {
+            background-color "transparent"
+            center-focused-column "never"
+            preset-column-widths {
+                ${presetWidths}
+            }
+            default-column-width { proportion ${proportion}; }
+            border {
+                off
+                width 4
+                active-color   "#707070"
+                inactive-color "#d0d0d0"
+                urgent-color   "${c.red_b}"
+            }
+            shadow {
+                softness 30
+                spread 5
+                offset x=0 y=5
+                color "#0007"
+            }
+            struts { }
+        }
+
+        layer-rule {
+            match namespace="^quickshell$"
+            place-within-backdrop true
+        }
+
+        overview {
+            workspace-shadow {
+                off
+            }
+        }
+
+        environment {
+            XDG_CURRENT_DESKTOP "niri"
+        }
+
+        hotkey-overlay {
+            skip-at-startup
+        }
+
+        prefer-no-csd
+        screenshot-path "~/Pictures/Screenshots/Screenshot from %Y-%m-%d %H-%M-%S.png"
+
+        animations {
+            workspace-switch {
+                spring damping-ratio=0.80 stiffness=523 epsilon=0.0001
+            }
+            window-open {
+                duration-ms 150
+                curve "ease-out-expo"
+            }
+            window-close {
+                duration-ms 150
+                curve "ease-out-quad"
+            }
+            horizontal-view-movement {
+                spring damping-ratio=0.85 stiffness=423 epsilon=0.0001
+            }
+            window-movement {
+                spring damping-ratio=0.75 stiffness=323 epsilon=0.0001
+            }
+            window-resize {
+                spring damping-ratio=0.85 stiffness=423 epsilon=0.0001
+            }
+            config-notification-open-close {
+                spring damping-ratio=0.65 stiffness=923 epsilon=0.001
+            }
+            screenshot-ui-open {
+                duration-ms 200
+                curve "ease-out-quad"
+            }
+            overview-open-close {
+                spring damping-ratio=0.85 stiffness=800 epsilon=0.0001
+            }
+        }
+
+        window-rule {
+            match app-id=r#"^org\.wezfurlong\.wezterm$"#
+            default-column-width {}
+        }
+        window-rule {
+            match app-id=r#"^org\.gnome\."#
+            draw-border-with-background false
+            geometry-corner-radius 12
+            clip-to-geometry true
+        }
+        window-rule {
+            match app-id=r#"^gnome-control-center$"#
+            match app-id=r#"^pavucontrol$"#
+            match app-id=r#"^nm-connection-editor$"#
+            default-column-width { proportion 0.5; }
+            open-floating false
+        }
+        window-rule {
+            match app-id=r#"^gnome-calculator$"#
+            match app-id=r#"^galculator$"#
+            match app-id=r#"^blueman-manager$"#
+            match app-id=r#"^org\.gnome\.Nautilus$"#
+            match app-id=r#"^xdg-desktop-portal$"#
+            open-floating true
+        }
+        window-rule {
+            match app-id=r#"^steam$"# title=r#"^notificationtoasts_\d+_desktop$"#
+            default-floating-position x=10 y=10 relative-to="bottom-right"
+            open-focused false
+        }
+        window-rule {
+            match app-id=r#"^org\.wezfurlong\.wezterm$"#
+            match app-id="Alacritty"
+            match app-id="zen"
+            match app-id="com.mitchellh.ghostty"
+            match app-id="kitty"
+            draw-border-with-background false
+        }
+        window-rule {
+            match app-id=r#"firefox$"# title="^Picture-in-Picture$"
+            match app-id="zoom"
+            open-floating true
+        }
+        window-rule {
+            match app-id=r#"org.quickshell$"#
+            open-floating true
+        }
+
+        recent-windows {
+            binds {
+                Alt+Tab         { next-window scope="output"; }
+                Alt+Shift+Tab   { previous-window scope="output"; }
+                Alt+grave       { next-window filter="app-id"; }
+                Alt+Shift+grave { previous-window filter="app-id"; }
+            }
+        }
+
+        debug {
+            honor-xdg-activation-with-invalid-serial
+        }
+
+        include "dms/colors.kdl"
+        include "dms/layout.kdl"
+        include "dms/alttab.kdl"
+        include "dms/binds.kdl"
+        include "dms/outputs.kdl"
+        include "dms/cursor.kdl"
+      '';
+    };
   };
 }
diff --git a/home/profiles/desktop.nix b/home/profiles/desktop.nix
index 3a113ff..cb5ddc1 100644
--- a/home/profiles/desktop.nix
+++ b/home/profiles/desktop.nix
@@ -1,12 +1,14 @@
 { pkgs, ... }:
 {
-  myConfig.wayland.enable = true;
   imports = [
     ../modules/kitty.nix
     ../modules/emacs.nix
     ../modules/niri.nix
     ../modules/dms.nix
   ];
+  myConfig.wayland.enable = true;
+  myConfig.niri.defaultColumnProportion = 0.33333;
+  myConfig.niri.presetColumnWidths      = [ 0.33333 0.5 0.66667 1.0 ];
   home.packages = with pkgs; [
     # desktop specific packages
   ];
diff --git a/home/profiles/notebook.nix b/home/profiles/notebook.nix
index 8ac9929..9754a54 100644
--- a/home/profiles/notebook.nix
+++ b/home/profiles/notebook.nix
@@ -7,6 +7,8 @@
     ../modules/dms.nix
   ];
   myConfig.wayland.enable = true;
+  myConfig.niri.defaultColumnProportion = 1.0;
+  myConfig.niri.presetColumnWidths      = [ 0.5 1.0 ];
   home.packages = with pkgs; [
     powertop
     acpi