diff --git a/src/app/coordinate-system/coordinate-system.component.sass b/src/app/coordinate-system/coordinate-system.component.sass
index c2ed8f3..0b13fdd 100644
--- a/src/app/coordinate-system/coordinate-system.component.sass
+++ b/src/app/coordinate-system/coordinate-system.component.sass
@@ -82,6 +82,7 @@
   p
     text-align: center
     margin-left: -10px
+    cursor: default
 
 .measure-band-y
   opacity: 0.6 !important
@@ -98,3 +99,4 @@
   p
     text-align: center
     margin-left: 10px
+    cursor: default
diff --git a/src/app/service/move.service.ts b/src/app/service/move.service.ts
index 0b0c7dc..57376ed 100644
--- a/src/app/service/move.service.ts
+++ b/src/app/service/move.service.ts
@@ -5,8 +5,6 @@ import { ObjectService } from './object.service';
   providedIn: 'root',
 })
 export class MoveService {
-  static G = 6.6743e-11;
-
   private interval: any | null = null;
 
   isPlaying: boolean = false;
diff --git a/src/app/service/settings.service.ts b/src/app/service/settings.service.ts
index 4d71da9..ff731f9 100644
--- a/src/app/service/settings.service.ts
+++ b/src/app/service/settings.service.ts
@@ -1,6 +1,11 @@
 import { Injectable } from '@angular/core';
 import { LocalStorageService } from './local-storage.service';
 import { CoordinateSystemComponent } from '../coordinate-system/coordinate-system.component';
+import {
+  CollisionMode,
+  collisionModeToString,
+  rotateCollisionMode,
+} from '../../types/CollisionMode';
 
 @Injectable({
   providedIn: 'root',
@@ -14,6 +19,8 @@ export class SettingsService {
   private static showLogo = true;
   private static showSettings = true;
 
+  private static collisionMode: CollisionMode = CollisionMode.IGNORE;
+
   static init() {
     if (this.isInit) {
       return;
@@ -25,6 +32,7 @@ export class SettingsService {
       this.showVelocityArrow = settings.showVelocityArrow;
       this.showLogo = settings.showLogo;
       this.showSettings = settings.showSettings;
+      this.collisionMode = settings.collisionMode;
     }
     this.isInit = true;
   }
@@ -37,6 +45,7 @@ export class SettingsService {
       showVelocityArrow: this.showVelocityArrow,
       showLogo: this.showLogo,
       showSettings: this.showSettings,
+      collisionMode: this.collisionMode,
     });
   }
 
@@ -89,6 +98,17 @@ export class SettingsService {
     this.saveSettings();
   }
 
+  static getCollisionMode(): string {
+    this.init();
+    return collisionModeToString(this.collisionMode);
+  }
+
+  static toggleCollisionMode(): void {
+    this.init();
+    this.collisionMode = rotateCollisionMode(this.collisionMode);
+    this.saveSettings();
+  }
+
   static toggleGridSize(): void {
     this.init();
 
diff --git a/src/app/settings/settings/settings.component.html b/src/app/settings/settings/settings.component.html
index c253840..7c7e78c 100644
--- a/src/app/settings/settings/settings.component.html
+++ b/src/app/settings/settings/settings.component.html
@@ -61,11 +61,8 @@ <h2>View</h2>
   <h2>Behavior</h2>
   <div class="row">
     <p class="label">Collision Mode</p>
-    <button
-      class="actionButton"
-      (click)="getSettings().toggleSettingsVisibility()"
-    >
-      {{ getSettings().isSettingsVisible() ? "ON" : "OFF" }}
+    <button class="actionButton" (click)="getSettings().toggleCollisionMode()">
+      {{ getSettings().getCollisionMode() }}
     </button>
   </div>
   <h2>Examples</h2>
diff --git a/src/app/settings/settings/settings.component.ts b/src/app/settings/settings/settings.component.ts
index e13b84b..6f9e916 100644
--- a/src/app/settings/settings/settings.component.ts
+++ b/src/app/settings/settings/settings.component.ts
@@ -8,7 +8,6 @@ import {
   getPlutoCharonExample,
   getThreeBody,
 } from '../../../data/examples';
-import { CoordinateSystemComponent } from 'src/app/coordinate-system/coordinate-system.component';
 import { ObjectService } from 'src/app/service/object.service';
 
 @Component({
diff --git a/src/types/CollisionMode.ts b/src/types/CollisionMode.ts
new file mode 100644
index 0000000..6282e80
--- /dev/null
+++ b/src/types/CollisionMode.ts
@@ -0,0 +1,27 @@
+export enum CollisionMode {
+  IGNORE = 'Ignore',
+  END = 'End',
+  JOIN = 'Join',
+}
+
+export function rotateCollisionMode(mode: CollisionMode): CollisionMode {
+  switch (mode) {
+    case CollisionMode.IGNORE:
+      return CollisionMode.END;
+    case CollisionMode.END:
+      return CollisionMode.JOIN;
+    case CollisionMode.JOIN:
+      return CollisionMode.IGNORE;
+  }
+}
+
+export function collisionModeToString(mode: CollisionMode): string {
+  switch (mode) {
+    case CollisionMode.IGNORE:
+      return 'Ignore';
+    case CollisionMode.END:
+      return 'End';
+    case CollisionMode.JOIN:
+      return 'Join';
+  }
+}