diff --git a/chrome/content/zotero/merge.xhtml b/chrome/content/zotero/merge.xhtml
index e3fa264e4f..5c20d4f8a8 100644
--- a/chrome/content/zotero/merge.xhtml
+++ b/chrome/content/zotero/merge.xhtml
@@ -35,7 +35,7 @@
 		xmlns:html="http://www.w3.org/1999/xhtml"
 		onload="Zotero_Merge_Window.init()"
 		drawintitlebar-platforms="mac"
-		style="min-width: 830px; min-height: 500px;"
+		style="min-width: 850px; min-height: 500px;"
 >
 	<wizard id="merge-window" title="">
 		<linkset>
diff --git a/scss/merge.scss b/scss/merge.scss
index 224a65deb6..937534fa81 100644
--- a/scss/merge.scss
+++ b/scss/merge.scss
@@ -6,7 +6,8 @@ wizardpage {
 
 merge-group {
 	display: flex;
-	overflow: auto;
+	overflow: hidden auto;
+	gap: 8px;
 
 	merge-pane {
 		flex: 1;
@@ -37,6 +38,10 @@ merge-group {
 		.delete-box {
 			min-width: 15em;
 		}
+
+		collapsible-section {
+			border-bottom: none !important;
+		}
 	}
 
 	&:not([mergetype="note"]) {