Add the description and buttons.

src/app/settings-dialog/os-settings/os-settings.component.html

@@ -1,4 +1,14 @@
 <div class="setting-title">Explorer Context Menu</div>
 <div class="setting-container">
-Placeholder
+  <div class="description">
+    Add/Remove "Open with Photo Location Map" in the context menu of Explorer.
+  </div>
+  <div class="buttons">
+    <button mat-stroked-button (click)="handleAddButtonClicked()">
+      Add
+    </button>
+    <button mat-stroked-button (click)="handleRemoveButtonClicked()">
+      Remove
+    </button>
+  </div>
 </div>

src/app/settings-dialog/os-settings/os-settings.component.scss

@@ -7,3 +7,17 @@
 .setting-container {
   padding: $setting-container-padding;
 }
+
+.description {
+  font-size: 14px;
+  margin-bottom: 20px;
+}
+
+.buttons {
+  display: flex;
+  gap: 30px;
+
+  button {
+     width: 100px;
+  }
+}

src/app/settings-dialog/os-settings/os-settings.component.ts

@@ -6,5 +6,11 @@ import { Component } from '@angular/core';
   styleUrl: './os-settings.component.scss'
 })
 export class OsSettingsComponent {
+  public handleAddButtonClicked() {
+    // TODO
+  }
 
+  public handleRemoveButtonClicked() {
+    // TODO
+  }
 }