diff --git a/html/inc/prefs.inc b/html/inc/prefs.inc
index 2557f24e00..a95003b2ce 100644
--- a/html/inc/prefs.inc
+++ b/html/inc/prefs.inc
@@ -505,7 +505,12 @@ function prefs_display_venue($prefs, $venue, $subset) {
         end_table();
         echo "</td></tr>\n";
     } else {
-        echo "<p><a href=add_venue.php?venue=$venue&subset=$subset$tokens>".tra("Add separate preferences for %1", $venue)."</a>";
+        echo "<p>";
+        show_button("add_venue.php?venue=$venue&subset=$subset$tokens>",
+            tra("Add separate preferences for %1", $venue),
+            tra("Add separate preferences for %1", $venue),
+            "btn-primary btn-sm"
+        );
     }
 }
 
@@ -534,8 +539,10 @@ function print_prefs_display_global($user, $columns=false) {
         prefs_show_global($global_prefs);
         $tokens = url_tokens($user->authenticator);
         row2("<br>",
-            "<a href=prefs_edit.php?subset=global$tokens>".tra("Edit preferences")."</a>
-        ");
+            button_text("prefs_edit.php?subset=global$tokens",
+                tra("Edit preferences")
+            )
+        );
         end_table();
 
         prefs_display_venue($global_prefs, "home", "global");
@@ -586,7 +593,7 @@ function print_prefs_form(
         prefs_form_project_specific($prefs->project_specific, $project_error);
     }
 
-    row2("", "<input class=\"btn btn-primary\" type=submit value=\"$submit_value\" name=\"action\">");
+    row2("", "<input class=\"btn btn-success\" type=submit value=\"$submit_value\" name=\"action\">");
     end_table();
     echo "</form>\n";
 }
diff --git a/html/inc/util.inc b/html/inc/util.inc
index 2e4dea94e4..c3bb9b1c77 100644
--- a/html/inc/util.inc
+++ b/html/inc/util.inc
@@ -829,18 +829,18 @@ function current_url() {
 // @param desc The title of the destination - typically used as a popup
 // @param class The optional CSS class of the button. Defaults to a standard button
 //
-function show_button($url, $text, $desc=null, $class="btn btn-default btn-xs") {
+
+function button_text($url, $text, $desc=null, $class="btn-success btn-sm") {
     if (!$desc) {
         $desc = $text;
     }
-    echo "<a href=\"".$url."\" title=\"$desc\" class=\"".$class."\">".$text."</a>
-    ";
+    return sprintf('<a href="%s" title="%s" class="btn %s"><span style="font-size:1.2em">%s</span></a>',
+        $url, $desc, $class, $text
+    );
 }
 
-function button_text($url, $text, $desc=null, $class="btn btn-default") {
-    if (!$desc) $desc = $text;
-    return "<a href=\"".$url."\" title=\"$desc\" class=\"".$class."\">".$text."</a>
-    ";
+function show_button($url, $text, $desc=null, $class="btn-success btn-sm") {
+    echo button_text($url, $text, $desc=null, $class);
 }
 
 // When multiple buttons (or actions) are presented in a list you can
diff --git a/html/user/prefs.php b/html/user/prefs.php
index f23d8d6e76..98c2e79f8b 100644
--- a/html/user/prefs.php
+++ b/html/user/prefs.php
@@ -49,10 +49,12 @@ if (isset($defaults)) {
 if ($subset == "global") {
     print_prefs_display_global($user, $columns);
     if (!$defaults) {
+        echo "<p>";
         show_button(
             "prefs_default.php",
             "Restore defaults",
-            "Restore default preferences"
+            "Restore default preferences",
+            "btn-warning btn-sm"
         );
     }
 } else {