diff --git a/src/app/layout/app.menuitem.component.ts b/src/app/layout/app.menuitem.component.ts
index 0179f42..4e81a7e 100644
--- a/src/app/layout/app.menuitem.component.ts
+++ b/src/app/layout/app.menuitem.component.ts
@@ -148,7 +148,7 @@ export class AppMenuitemComponent implements OnInit, OnDestroy {
     }
 
     get submenuAnimation() {
-        if (this.layoutService.isDesktop() && (this.layoutService.isHorizontal() || this.layoutService.isSlim()))
+        if (this.layoutService.isDesktop() && this.layoutService.isSlim())
             return this.active ? 'visible' : 'hidden';
         else
             return this.root ? 'expanded' : (this.active ? 'expanded' : 'collapsed');
diff --git a/src/app/layout/config/app.config.component.ts b/src/app/layout/config/app.config.component.ts
index 72d315d..9e700f8 100644
--- a/src/app/layout/config/app.config.component.ts
+++ b/src/app/layout/config/app.config.component.ts
@@ -36,7 +36,7 @@ export class AppConfigComponent {
 
     set menuMode(_val: string) {
         this.layoutService.config.menuMode = _val;
-        if (this.layoutService.isSlim() || this.layoutService.isHorizontal()) {
+        if (this.layoutService.isSlim()) {
             this.menuService.reset();
         }
     }
diff --git a/src/app/layout/service/app.layout.service.ts b/src/app/layout/service/app.layout.service.ts
index 1cf1b8c..bc2c407 100644
--- a/src/app/layout/service/app.layout.service.ts
+++ b/src/app/layout/service/app.layout.service.ts
@@ -97,10 +97,6 @@ export class LayoutService {
         return this.config.menuMode === 'slim';
     }
 
-    isHorizontal() {
-        return this.config.menuMode === 'horizontal';
-    }
-
     isMobile() {
         return !this.isDesktop();
     }