diff --git a/ui/gallery-prototype.js b/ui/gallery-prototype.js
index dd25809d..693bab28 100755
--- a/ui/gallery-prototype.js
+++ b/ui/gallery-prototype.js
@@ -685,7 +685,6 @@ var toggleWideView = createCSSClassToggler('.viewer', 'wide-view-mode',
 
 
 
-// XXX write CSS for this...
 var toggleSingleRibbonMode = createCSSClassToggler('.viewer', 'single-ribbon-mode')
 
 
diff --git a/ui/gallery.css b/ui/gallery.css
index 4a932481..b3ca213b 100755
--- a/ui/gallery.css
+++ b/ui/gallery.css
@@ -243,4 +243,13 @@
 }
 
 
+/* single ribbon mode */
+.single-ribbon-mode .ribbon {
+	opacity: 0;
+}
+
+.single-ribbon-mode .current.ribbon {
+	opacity: 1;
+}
+
 
diff --git a/ui/keybindings.js b/ui/keybindings.js
index 4cd53ffa..51b04a72 100755
--- a/ui/keybindings.js
+++ b/ui/keybindings.js
@@ -3,6 +3,7 @@
 var keybindings = {
 	//191: 	toggleHelp,										//	?
 	70:		toggleSingleImageMode,							//	f
+	83:		toggleSingleRibbonMode,							//	s
 	13:		70,												//	Enter
 	84:		toggleSingleImageModeTransitions,				//	t
 	65:		toggleTransitions,								//	a