diff --git a/src/lib/Highlight.svelte b/src/lib/Highlight.svelte
index a34077c..92ba975 100644
--- a/src/lib/Highlight.svelte
+++ b/src/lib/Highlight.svelte
@@ -8,10 +8,18 @@
 	export let alt;
 
 	let renderedCode;
-	$: renderedCode = slice ? code.replace(/#<hidden>[^]*?#<\/hidden>/, "") : code;;
+	$: renderedCode = slice ? code.replace(/#<hidden>[^]*?#<\/hidden>/, "") : code;
 </script>
 
 <p class="sr-only">{alt}</p>
-<div class="whitespace-pre-wrap font-mono" aria-hidden title={alt}>
+<div class="whitespace-pre-wrap font-mono relative" aria-hidden title={alt}>
 	<Highlight {language} code={renderedCode} />
+	<button
+		class="top-0 right-0 absolute font-sans text-xs font-bold"
+		class:text-blue-500={slice}
+		on:click={() => { slice = !slice }}
+	>
+		({slice ? "show" : "hide"} full)
+	</button>
 </div>
+
diff --git a/src/routes/demo1/vm.nix b/src/routes/demo1/vm.nix
index 3e17ac4..ea81687 100644
--- a/src/routes/demo1/vm.nix
+++ b/src/routes/demo1/vm.nix
@@ -17,5 +17,9 @@ with import <nixpkgs> { }; nixos
     enable = true;
     settings.PermitRootLogin = "yes";
   };
+  # run with:
+  # nix-build vm.nix -A vm && (rm nixos.qcow2 ; QEMU_NET_OPTS='hostfwd=tcp::3000-:80' ./result/bin/run-nixos-vm)
+  # xdg-open http://localhost:3000
+
 #</hidden>
 }