diff --git a/frontend/styles/view/main/help-dialog.css b/frontend/styles/view/main/help-dialog.css
index aabe842..308d7fa 100644
--- a/frontend/styles/view/main/help-dialog.css
+++ b/frontend/styles/view/main/help-dialog.css
@@ -1,8 +1,3 @@
-vaadin-dialog-overlay {
-	width: 1000px;
-	height: 600px;
-}
-
 #contentLayout {
 	padding-left: 0;
 	padding-right: 0;
@@ -21,6 +16,10 @@ vaadin-dialog-overlay {
 	right: 0;
 }
 
+#accordion {
+	width: 100%;
+}
+
 .help-field {
 	justify-content: center;
 	align-items: center;
diff --git a/src/main/java/edu/kit/typicalc/view/main/HelpDialog.java b/src/main/java/edu/kit/typicalc/view/main/HelpDialog.java
index 648a83c..43e1fa5 100644
--- a/src/main/java/edu/kit/typicalc/view/main/HelpDialog.java
+++ b/src/main/java/edu/kit/typicalc/view/main/HelpDialog.java
@@ -31,6 +31,7 @@ public class HelpDialog extends Dialog implements LocaleChangeObserver {
     private static final String HEADING_LAYOUT_ID = "headingLayout";
     private static final String CONTENT_LAYOUT_ID = "contentLayout";
     private static final String LANGUAGE_SELECT_ID = "languageSelect";
+    private static final String ACCORDION_ID = "accordion";
 
     private final H3 heading;
     private final Select<Locale> languageSelect;
@@ -53,9 +54,13 @@ public class HelpDialog extends Dialog implements LocaleChangeObserver {
 
         VerticalLayout contentLayout = new VerticalLayout();
         Accordion content = createHelpContent();
+        content.setId(ACCORDION_ID);
         contentLayout.add(content);
         contentLayout.setId(CONTENT_LAYOUT_ID);
         add(headingLayout, contentLayout);
+        // setting size of overlay does not work if all accordion panels are closed
+        setWidth("1000px");
+        setHeight("600px");
     }
 
     private Accordion createHelpContent() {
@@ -84,5 +89,6 @@ public class HelpDialog extends Dialog implements LocaleChangeObserver {
         languageSelect.setLabel(getTranslation("root.selectLanguage"));
         languageSelect.setTextRenderer(renderer);
         // TODO update help texts
+        // language-switch already works
     }
 }