diff --git a/ui/gallery-prototype.js b/ui/gallery-prototype.js
index 7503acca..9e0ad310 100755
--- a/ui/gallery-prototype.js
+++ b/ui/gallery-prototype.js
@@ -6,7 +6,7 @@
 var keys = {
 	toggleHelp: [72],
 	toggleSingleImageMode: [70, 13],	// ???, Enter
-	toggleSingleImageModeTransitions: [65],	// a
+	toggleSingleImageModeTransitions: [84],	// t
 	close: [27, 88, 67],
 
 	// zooming...
diff --git a/ui/gallery.html b/ui/gallery.html
index f0fb4125..a72935a9 100755
--- a/ui/gallery.html
+++ b/ui/gallery.html
@@ -101,7 +101,7 @@ $(document).ready(setup);
 
 	<br><br>
 
-	<button onclick="toggleSingleImageModeTransitions()">toggle single image mode transitions (a)</button>
+	<button onclick="toggleSingleImageModeTransitions()">toggle single image mode transitions (t)</button>
 
 	<br><br>