diff --git a/polygerrit-ui/app/embed/diff/gr-diff-builder/gr-diff-row.ts b/polygerrit-ui/app/embed/diff/gr-diff-builder/gr-diff-row.ts
index 13a6b00..b97ae59 100644
--- a/polygerrit-ui/app/embed/diff/gr-diff-builder/gr-diff-row.ts
+++ b/polygerrit-ui/app/embed/diff/gr-diff-builder/gr-diff-row.ts
@@ -160,6 +160,8 @@
         ${this.renderLineNumberCell(Side.RIGHT)}
         ${this.renderSignCell(Side.RIGHT)} ${this.renderContentCell(Side.RIGHT)}
       </tr>
+      ${this.renderPostLineSlot(Side.LEFT)}
+      ${this.renderPostLineSlot(Side.RIGHT)}
     `;
     if (this.addTableWrapperForTesting) {
       return html`<table>
@@ -456,6 +458,13 @@
         id=${this.contentId(side)}
       >${textElement}</div>`;
   }
+
+  private renderPostLineSlot(side: Side) {
+    const lineNumber = this.lineNumber(side);
+    return lineNumber && Number.isInteger(lineNumber)
+      ? html`<slot name="post-${side}-line-${lineNumber}"></slot>`
+      : nothing;
+  }
 }
 
 declare global {
diff --git a/polygerrit-ui/app/embed/diff/gr-diff-builder/gr-diff-row_test.ts b/polygerrit-ui/app/embed/diff/gr-diff-builder/gr-diff-row_test.ts
index 1c7b311..42d30aa 100644
--- a/polygerrit-ui/app/embed/diff/gr-diff-builder/gr-diff-row_test.ts
+++ b/polygerrit-ui/app/embed/diff/gr-diff-builder/gr-diff-row_test.ts
@@ -87,6 +87,8 @@
                 </div>
               </td>
             </tr>
+            <slot name="post-left-line-1"></slot>
+            <slot name="post-right-line-1"></slot>
           </tbody>
         </table>
       `
@@ -147,6 +149,8 @@
                 </div>
               </td>
             </tr>
+            <slot name="post-left-line-1"></slot>
+            <slot name="post-right-line-1"></slot>
           </tbody>
         </table>
       `
@@ -201,6 +205,7 @@
                   <slot name="right-1"> </slot>
                 </div>
               </td>
+              <slot name="post-right-line-1"></slot>
             </tr>
           </tbody>
         </table>
@@ -257,6 +262,7 @@
                 <div class="contentText gr-diff" data-side="right"></div>
               </td>
             </tr>
+            <slot name="post-left-line-1"></slot>
           </tbody>
         </table>
       `
diff --git a/polygerrit-ui/app/embed/diff/gr-diff-builder/gr-diff-section_test.ts b/polygerrit-ui/app/embed/diff/gr-diff-builder/gr-diff-section_test.ts
index 14f4536..381f9b2 100644
--- a/polygerrit-ui/app/embed/diff/gr-diff-builder/gr-diff-section_test.ts
+++ b/polygerrit-ui/app/embed/diff/gr-diff-builder/gr-diff-section_test.ts
@@ -126,8 +126,14 @@
       element,
       /* HTML */ `
         <gr-diff-row class="left-1 right-1"> </gr-diff-row>
+        <slot name="post-left-line-1"></slot>
+        <slot name="post-right-line-1"></slot>
         <gr-diff-row class="left-1 right-1"> </gr-diff-row>
+        <slot name="post-left-line-1"></slot>
+        <slot name="post-right-line-1"></slot>
         <gr-diff-row class="left-1 right-1"> </gr-diff-row>
+        <slot name="post-left-line-1"></slot>
+        <slot name="post-right-line-1"></slot>
         <table>
           <tbody class="both gr-diff section">
             <tr