diff --git a/submit.html b/submit.html
index c9c42d5..dfec93c 100644
--- a/submit.html
+++ b/submit.html
@@ -1,22 +1,33 @@
 <html>
+<head>
+ <meta name="viewport" content="width=device-width, initial-scale=1.0"> 
+</head>
+<body>
 Send text and commands to the immersive space :
 <form>
 <textarea rows="5" cols="33">
 </textarea>
 <br>
+<input type=button onclick=replaceWithThisText(this) value=Clear></input>
 <input type=button onclick=sendtovr(this) value=Send></input>
 </form>
 <br>
-<a onclick=replaceWithThisText(this)>jxr toggleVisibilityEntitiesFromClass('fot')</a>
+Examples, tap to add, optionally modify and send :
+<ul>
+<li><a onclick=replaceWithThisText(this)>jxr qs a-sphere sa color green</a></li>
+<li><a onclick=replaceWithThisText(this)>jxr toggleVisibilityEntitiesFromClass('fot')</a></li>
+</ul>
 
 <hr>
 <br>
 Documentation as :
 
 <ul>
+<li><a href=https://fabien.benetou.fr/PIMVRdata/FoT>what has already been added by others</a> in a PIM as a wiki (also editable),</li>
 <li><a href=https://fabien.benetou.fr/PIMVRdata/CabinCommands?action=source>example of instructions and commands already positioned</a>,</li>
 <li><a href=https://fabien.benetou.fr/pub/home/future_of_text_demo/engine/>live result</a> (ideally in VR) and</li> 
-<li>open-source <a href=https://git.benetou.fr/utopiah/text-code-xr-engine/issues>code repository</a> where you can see the code and make your own suggestions via issues. </li>
+<li>open-source <a href=https://git.benetou.fr/utopiah/text-code-xr-engine/issues>code repository</a> of the code and to make your own suggestions via issues. </li>
+<li><a href=qrcode.png>QRcode</a> of this page to share with others also on mobile.</li>
 </ul>
 <script>
 function replaceWithThisText(element){
@@ -28,7 +39,7 @@ function sendtovr(cabin){
 text = document.querySelector("textarea").value
 document.querySelector("textarea").value = ''
 
- fetch(url+'source')
+if (text) fetch(url+'source')
           .then( response => { return response.text() } )
           .then( data => {
 
@@ -37,7 +48,9 @@ document.querySelector("textarea").value = ''
 		  headers: {'Content-Type':'application/x-www-form-urlencoded'},
 		  body: "post=1&author=PIMVR&authpw=edit_password&text="+ data+'%0a'+text }).then(res => res).then(res => console.log("saved remotely", res))
 	})
+else alert("empty text, please write something and try again")
 }
 
 </script>
+</body>
 </html>
