diff --git a/src/app/services/overlay.service.ts b/src/app/services/overlay.service.ts
index 51918b6..1d79bfc 100644
--- a/src/app/services/overlay.service.ts
+++ b/src/app/services/overlay.service.ts
@@ -10,6 +10,12 @@ export class OverlayService {
 
   constructor() {}
 
+  /**
+   * Set the overlay data subject.
+   *
+   * @param overlay The overlay type.
+   * @param data The overlay data.
+   */
   setOverlayData(overlay: string, data: any) {
     this.overlayDataSubject.next({ overlay, data });
   }