Update app.py

app.py

@@ -1124,9 +1124,9 @@ with gr.Blocks(css=css, js=js, head=head) as demo:
               <canvas id='cnv_out'></canvas>
               <div id='compass_box'><div id='compass'><a id='fullscreen' onclick='
                 const model3D = document.getElementById(\"model3D\");
-                if (model3D.style.width != \"100vw\") {
-                  model3D.style.width = window.innerWidth + \"px\";
-                  model3D.style.height = window.innerHeight + \"px\";
+                if (model3D.style.width != window.innerWidth/2 + \"px\") {
+                  model3D.style.width = window.innerWidth/2 + \"px\";
+                  model3D.style.height = window.innerHeight/2 + \"px\";
                   model3D.style.position = \"fixed\";
                   model3D.style.left = \"0\";
                   model3D.style.top = \"0\";