diff --git a/src/lib/ComfyGraphCanvas.ts b/src/lib/ComfyGraphCanvas.ts
index f3c098c..ae686bb 100644
--- a/src/lib/ComfyGraphCanvas.ts
+++ b/src/lib/ComfyGraphCanvas.ts
@@ -194,6 +194,8 @@ export default class ComfyGraphCanvas extends LGraphCanvas {
         }
     }
 
+    private static CONNECTION_POS: Vector2 = [0, 0];
+
     private highlightNodeInput(node: LGraphNode, inputSlot: SlotNameOrIndex, ctx: CanvasRenderingContext2D) {
         let inputIndex: number;
         if (typeof inputSlot === "number")
@@ -201,7 +203,7 @@ export default class ComfyGraphCanvas extends LGraphCanvas {
         else
             inputIndex = node.findInputSlotIndexByName(inputSlot)
         if (inputIndex !== -1) {
-            let pos = node.getConnectionPos(true, inputIndex);
+            let pos = node.getConnectionPos(true, inputIndex, ComfyGraphCanvas.CONNECTION_POS);
             ctx.beginPath();
             ctx.arc(pos[0] - node.pos[0], pos[1] - node.pos[1], 12, 0, 2 * Math.PI, false)
             ctx.stroke();
diff --git a/src/lib/components/ComfyApp.ts b/src/lib/components/ComfyApp.ts
index 751040c..d7e696c 100644
--- a/src/lib/components/ComfyApp.ts
+++ b/src/lib/components/ComfyApp.ts
@@ -274,6 +274,16 @@ export default class ComfyApp {
             console.error(`Failed to load config, falling back to defaults`, error)
             configState.loadDefault();
         }
+
+        // configState.onChange("linkDisplayType", (newValue) => {
+        //     if (!this.lCanvas)
+        //         return;
+
+        //     this.lCanvas.links_render_mode = newValue;
+        //     this.lCanvas.setDirty(true, true);
+        // })
+
+        configState.runOnChangedEvents();
     }
 
     async loadBuiltInTemplates(): Promise<SerializedComfyBoxTemplate[]> {
diff --git a/src/lib/components/ComfySettingsView.svelte b/src/lib/components/ComfySettingsView.svelte
index 01fcb41..15d3dcd 100644
--- a/src/lib/components/ComfySettingsView.svelte
+++ b/src/lib/components/ComfySettingsView.svelte
@@ -1,5 +1,5 @@
 <script lang="ts">
- import { CONFIG_CATEGORIES, CONFIG_DEFS_BY_CATEGORY, type ConfigDefAny } from "$lib/stores/configDefs";
+ import { CONFIG_CATEGORIES, CONFIG_DEFS_BY_CATEGORY, CONFIG_DEFS_BY_NAME, type ConfigDefAny, type ConfigDefEnum, type ConfigState } from "$lib/stores/configDefs";
  import { capitalize } from "$lib/utils";
  import { Checkbox } from "@gradio/form";
  import configState from "$lib/stores/configState";
@@ -13,7 +13,7 @@
  export let app: ComfyApp
 
  let selectedCategory = CONFIG_CATEGORIES[0];
- let changes = {}
+ let changes: Partial<Record<keyof ConfigState, any>> = {}
 
  const toastOptions = {
      intro: { duration: 200 },
@@ -28,14 +28,23 @@
 
  function setOption(def: ConfigDefAny, value: any) {
      if (!configState.validateConfigOption(def, value)) {
-         console.warn(`[configState] Invalid value for option ${def.name} (${v}), setting to default (${def.defaultValue})`);
+         console.warn(`[configState] Invalid value for option ${def.name} (${value}), setting to default (${def.defaultValue})`);
          value = def.defaultValue
      }
      changes[def.name] = value;
  }
 
+ function setEnumOption(def: ConfigDefEnum<any, any>, e: Event): void {
+     const select = e.target as HTMLSelectElement;
+     const index = select.selectedIndex
+     setOption(def, def.options.values[index].value)
+ }
+
  function doSave() {
-     $configState = { ...$configState, ...changes };
+     for (const [k, v] of Object.entries(changes)) {
+         const def = CONFIG_DEFS_BY_NAME[k]
+         configState.setConfigOption(def, v, true);
+     }
      changes = {};
      const json = JSON.stringify($configState);
      localStorage.setItem("config", json);
@@ -46,7 +55,7 @@
      if (!confirm("Are you sure you want to reset the config to the defaults?"))
          return;
 
-     configState.loadDefault();
+     configState.loadDefault(true);
      notify("Config reset!")
  }
 </script>
@@ -88,6 +97,16 @@
                                 <span class="ctrl string-array">
                                     {value.join(",")}
                                 </span>
+                            {:else if def.type === "enum"}
+                                <div class="description">{def.description}</div>
+                                <span class="ctrl enum">
+                                    <select id="ui-theme" name="ui-theme" on:change={(e) => setEnumOption(def, e)}>
+                                        {#each def.options.values as option, i}
+                                            {@const selected = def.options.values[i].value === value}
+                                            <option value={option.value} {selected}>{option.label}</option>
+                                        {/each}
+                                    </select>
+                                </span>
                             {:else}
                                 (Unknown config type {def.type})
                             {/if}
@@ -195,6 +214,17 @@
                  font-size: 11pt;
              }
          }
+
+         &.enum {
+             select {
+                 -webkit-appearance: none;
+                 -moz-appearance: none;
+                 background-image: url("data:image/svg+xml;utf8,<svg fill='white' height='24' viewBox='0 0 24 24' width='24' xmlns='http://www.w3.org/2000/svg'><path d='M7 10l5 5 5-5z'/><path d='M0 0h24v24H0z' fill='none'/></svg>");
+                 background-repeat: no-repeat;
+                 background-position-x: 100%;
+                 background-position-y: 8px;
+             }
+         }
      }
  }
 
diff --git a/src/lib/stores/configDefs.ts b/src/lib/stores/configDefs.ts
index df75e9f..0962f4f 100644
--- a/src/lib/stores/configDefs.ts
+++ b/src/lib/stores/configDefs.ts
@@ -1,7 +1,9 @@
+import { LinkRenderMode } from "@litegraph-ts/core";
+
 /*
  * Supported config option types.
  */
-type ConfigDefType = "boolean" | "number" | "string" | "string[]";
+type ConfigDefType = "boolean" | "number" | "string" | "string[]" | "enum";
 
 // A simple parameter description interface
 export interface ConfigDef<IdType extends string, TypeType extends ConfigDefType, ValueType, OptionsType = any> {
@@ -17,21 +19,46 @@ export interface ConfigDef<IdType extends string, TypeType extends ConfigDefType
 
     defaultValue: ValueType,
 
-    options: OptionsType
+    options: OptionsType,
 }
 
 export type ConfigDefAny = ConfigDef<string, any, any>
-type ConfigDefBoolean<IdType extends string> = ConfigDef<IdType, "boolean", boolean>;
+export type ConfigDefBoolean<IdType extends string> = ConfigDef<IdType, "boolean", boolean>;
 
-type NumberOptions = {
+export type NumberOptions = {
     min?: number,
     max?: number,
     step: number
 }
-type ConfigDefNumber<IdType extends string> = ConfigDef<IdType, "number", number, NumberOptions>;
+export type ConfigDefNumber<IdType extends string> = ConfigDef<IdType, "number", number, NumberOptions>;
 
-type ConfigDefString<IdType extends string> = ConfigDef<IdType, "string", string>;
-type ConfigDefStringArray<IdType extends string> = ConfigDef<IdType, "string[]", string[]>;
+export type ConfigDefString<IdType extends string> = ConfigDef<IdType, "string", string>;
+export type ConfigDefStringArray<IdType extends string> = ConfigDef<IdType, "string[]", string[]>;
+
+export interface EnumValue<T> {
+    label: string,
+    value: T
+}
+export interface EnumOptions<T> {
+    values: EnumValue<T>[]
+}
+export type ConfigDefEnum<IdType extends string, T> = ConfigDef<IdType, "enum", T, EnumOptions<T>>;
+
+export function validateConfigOption(def: ConfigDefAny, v: any): boolean {
+    switch (def.type) {
+        case "boolean":
+            return typeof v === "boolean";
+        case "number":
+            return typeof v === "number";
+        case "string":
+            return typeof v === "string";
+        case "string[]":
+            return Array.isArray(v) && v.every(vs => typeof vs === "string");
+        case "enum":
+            return Boolean(def.options.values.find((o: EnumValue<any>) => o.value === v));
+    }
+    return false;
+}
 
 // Configuration parameters ------------------------------------
 
@@ -102,6 +129,30 @@ const defBuiltInTemplates: ConfigDefStringArray<"builtInTemplates"> = {
     options: {}
 };
 
+// const defLinkDisplayType: ConfigDefEnum<"linkDisplayType", LinkRenderMode> = {
+//     name: "linkDisplayType",
+//     type: "enum",
+//     defaultValue: LinkRenderMode.SPLINE_LINK,
+//     category: "graph",
+//     description: "How to display links in the graph",
+//     options: {
+//         values: [
+//             {
+//                 value: LinkRenderMode.STRAIGHT_LINK,
+//                 label: "Straight"
+//             },
+//             {
+//                 value: LinkRenderMode.LINEAR_LINK,
+//                 label: "Linear"
+//             },
+//             {
+//                 value: LinkRenderMode.SPLINE_LINK,
+//                 label: "Spline"
+//             }
+//         ]
+//     },
+// };
+
 // Configuration exports ------------------------------------
 
 export const CONFIG_DEFS = [
@@ -112,6 +163,7 @@ export const CONFIG_DEFS = [
     defConfirmWhenUnloadingUnsavedChanges,
     defCacheBuiltInResources,
     defBuiltInTemplates,
+    // defLinkDisplayType
 ] as const;
 
 export const CONFIG_DEFS_BY_NAME: Record<string, ConfigDefAny>
diff --git a/src/lib/stores/configState.ts b/src/lib/stores/configState.ts
index 1772bca..4ecf4ce 100644
--- a/src/lib/stores/configState.ts
+++ b/src/lib/stores/configState.ts
@@ -2,41 +2,34 @@ import { debounce } from '$lib/utils';
 import { toHashMap } from '@litegraph-ts/core';
 import { get, writable } from 'svelte/store';
 import type { Writable } from 'svelte/store';
-import { defaultConfig, type ConfigState, type ConfigDefAny, CONFIG_DEFS_BY_NAME } from './configDefs';
+import { defaultConfig, type ConfigState, type ConfigDefAny, CONFIG_DEFS_BY_NAME, validateConfigOption } from './configDefs';
 
 type ConfigStateOps = {
     getBackendURL: () => string,
-    load: (data: any) => ConfigState
-    loadDefault: () => ConfigState
-    setConfigOption: (def: ConfigDefAny, v: any) => boolean
+
+    load: (data: any, runOnChanged?: boolean) => ConfigState
+    loadDefault: (runOnChanged?: boolean) => ConfigState
+    setConfigOption: (def: ConfigDefAny, v: any, runOnChanged: boolean) => boolean
     validateConfigOption: (def: ConfigDefAny, v: any) => boolean
+    onChange: <K extends keyof ConfigState>(optionName: K, callback: ConfigOnChangeCallback<ConfigState[K]>) => void
+    runOnChangedEvents: () => void,
 }
 
 export type WritableConfigStateStore = Writable<ConfigState> & ConfigStateOps;
 const store: Writable<ConfigState> = writable({ ...defaultConfig })
+const callbacks: Record<string, ConfigOnChangeCallback<any>[]> = {}
+let changedOptions: Partial<Record<keyof ConfigState, [any, any]>> = {}
 
 function getBackendURL(): string {
     const state = get(store);
     return `${window.location.protocol}//${state.comfyUIHostname}:${state.comfyUIPort}`
 }
 
-function validateConfigOption(def: ConfigDefAny, v: any): boolean {
-    switch (def.type) {
-        case "boolean":
-            return typeof v === "boolean";
-        case "number":
-            return typeof v === "number";
-        case "string":
-            return typeof v === "string";
-        case "string[]":
-            return Array.isArray(v) && v.every(vs => typeof vs === "string");
-    }
-    return false;
-}
-
-function setConfigOption(def: ConfigDefAny, v: any): boolean {
+function setConfigOption(def: ConfigDefAny, v: any, runOnChanged: boolean): boolean {
     let valid = false;
     store.update(state => {
+        const oldValue = state[def.name]
+
         valid = validateConfigOption(def, v);
 
         if (!valid) {
@@ -47,12 +40,33 @@ function setConfigOption(def: ConfigDefAny, v: any): boolean {
             state[def.name] = v
         }
 
+        const changed = oldValue != state[def.name];
+        if (changed) {
+            if (runOnChanged) {
+                if (callbacks[def.name]) {
+                    for (const callback of callbacks[def.name]) {
+                        callback(state[def.name], oldValue)
+                    }
+                }
+            }
+            else {
+                if (changedOptions[def.name] == null) {
+                    changedOptions[def.name] = [oldValue, state[def.name]];
+                }
+                else {
+                    changedOptions[def.name][1] = state[def.name]
+                }
+            }
+        }
+
         return state;
     })
     return valid;
 }
 
-function load(data: any): ConfigState {
+function load(data: any, runOnChanged: boolean = false): ConfigState {
+    changedOptions = {}
+
     store.set({ ...defaultConfig })
     if (data != null && typeof data === "object") {
         for (const [k, v] of Object.entries(data)) {
@@ -62,15 +76,36 @@ function load(data: any): ConfigState {
                 continue;
             }
 
-            setConfigOption(def, v);
+            setConfigOption(def, v, runOnChanged);
         }
     }
 
     return get(store);
 }
 
-function loadDefault() {
-    return load(null);
+function loadDefault(runOnChanged: boolean = false) {
+    return load(null, runOnChanged);
+}
+
+export type ConfigOnChangeCallback<V> = (value: V, oldValue?: V) => void;
+
+function onChange<K extends keyof ConfigState>(optionName: K, callback: ConfigOnChangeCallback<ConfigState[K]>) {
+    callbacks[optionName] ||= []
+    callbacks[optionName].push(callback)
+}
+
+function runOnChangedEvents() {
+    console.debug("Running changed events for config...")
+    for (const [optionName, [oldValue, newValue]] of Object.entries(changedOptions)) {
+        const def = CONFIG_DEFS_BY_NAME[optionName]
+        if (callbacks[optionName]) {
+            console.debug("Running callback!", optionName, oldValue, newValue)
+            for (const callback of callbacks[def.name]) {
+                callback(newValue, oldValue)
+            }
+        }
+    }
+    changedOptions = {}
 }
 
 const configStateStore: WritableConfigStateStore =
@@ -80,6 +115,8 @@ const configStateStore: WritableConfigStateStore =
     validateConfigOption,
     setConfigOption,
     load,
-    loadDefault
+    loadDefault,
+    onChange,
+    runOnChangedEvents
 }
 export default configStateStore;