diff --git a/src/web/Manager.mjs b/src/web/Manager.mjs
index 851eaa53..ad57f015 100755
--- a/src/web/Manager.mjs
+++ b/src/web/Manager.mjs
@@ -185,7 +185,7 @@ class Manager {
         document.getElementById("copy-output").addEventListener("click", this.output.copyClick.bind(this.output));
         document.getElementById("switch").addEventListener("click", this.output.switchClick.bind(this.output));
         document.getElementById("undo-switch").addEventListener("click", this.output.undoSwitchClick.bind(this.output));
-        // document.getElementById("maximise-output").addEventListener("click", this.output.maximiseOutputClick.bind(this.output));
+        document.getElementById("maximise-output").addEventListener("click", this.output.maximiseOutputClick.bind(this.output));
         document.getElementById("magic").addEventListener("click", this.output.magicClick.bind(this.output));
         document.getElementById("output-text").addEventListener("scroll", this.highlighter.outputScroll.bind(this.highlighter));
         document.getElementById("output-text").addEventListener("mouseup", this.highlighter.outputMouseup.bind(this.highlighter));
diff --git a/src/web/OutputWaiter.mjs b/src/web/OutputWaiter.mjs
index 3013f841..6d272d9e 100755
--- a/src/web/OutputWaiter.mjs
+++ b/src/web/OutputWaiter.mjs
@@ -1184,6 +1184,29 @@ class OutputWaiter {
             }
         });
     }
+
+    /**
+     * Handler for maximise output click events.
+     * Resizes the output frame to be as large as possible, or restores it to its original size.
+     */
+    maximiseOutputClick(e) {
+        const el = e.target.id === "maximise-output" ? e.target : e.target.parentNode;
+
+        if (el.getAttribute("data-original-title").indexOf("Maximise") === 0) {
+            this.app.initialiseSplitter(true);
+            this.app.columnSplitter.collapse(0);
+            this.app.columnSplitter.collapse(1);
+            this.app.ioSplitter.collapse(0);
+
+            $(el).attr("data-original-title", "Restore output pane");
+            el.querySelector("i").innerHTML = "fullscreen_exit";
+        } else {
+            $(el).attr("data-original-title", "Maximise output pane");
+            el.querySelector("i").innerHTML = "fullscreen";
+            this.app.initialiseSplitter(false);
+            this.app.resetLayout();
+        }
+    }
 }
 
 export default OutputWaiter;