diff --git a/Libraries/LibGUI/GModelSelection.cpp b/Libraries/LibGUI/GModelSelection.cpp
index 6eee4570f9..bf3a6fb37e 100644
--- a/Libraries/LibGUI/GModelSelection.cpp
+++ b/Libraries/LibGUI/GModelSelection.cpp
@@ -20,6 +20,16 @@ void GModelSelection::add(const GModelIndex& index)
     m_view.notify_selection_changed({});
 }
 
+void GModelSelection::toggle(const GModelIndex& index)
+{
+    ASSERT(index.is_valid());
+    if (m_indexes.contains(index))
+        m_indexes.remove(index);
+    else
+        m_indexes.set(index);
+    m_view.notify_selection_changed({});
+}
+
 bool GModelSelection::remove(const GModelIndex& index)
 {
     ASSERT(index.is_valid());
diff --git a/Libraries/LibGUI/GModelSelection.h b/Libraries/LibGUI/GModelSelection.h
index d1c7ba9172..33430508ef 100644
--- a/Libraries/LibGUI/GModelSelection.h
+++ b/Libraries/LibGUI/GModelSelection.h
@@ -14,9 +14,18 @@ public:
 
     bool is_empty() const { return m_indexes.is_empty(); }
     bool contains(const GModelIndex& index) const { return m_indexes.contains(index); }
+    bool contains_row(int row) const
+    {
+        for (auto& index : m_indexes) {
+            if (index.row() == row)
+                return true;
+        }
+        return false;
+    }
 
     void set(const GModelIndex&);
     void add(const GModelIndex&);
+    void toggle(const GModelIndex&);
     bool remove(const GModelIndex&);
     void clear();