diff --git a/l10n/en-US/viewer.properties b/l10n/en-US/viewer.properties
index 80f9cd925..6afb232e7 100644
--- a/l10n/en-US/viewer.properties
+++ b/l10n/en-US/viewer.properties
@@ -18,8 +18,8 @@ zoom_in_label=Zoom In
 zoom.title=Zoom
 print.title=Print
 print_label=Print
-fullscreen.title=Fullscreen
-fullscreen_label=Fullscreen
+presentation_mode.title=Switch to Presentation Mode
+presentation_mode_label=Presentation Mode
 open_file.title=Open File
 open_file_label=Open
 download.title=Download
diff --git a/web/viewer.html b/web/viewer.html
index 5a2f4f28c..70cd8cdb0 100644
--- a/web/viewer.html
+++ b/web/viewer.html
@@ -135,8 +135,8 @@ limitations under the License.
                 <input id="fileInput" class="fileInput" type="file" oncontextmenu="return false;" style="visibility: hidden; position: fixed; right: 0; top: 0" />
 
 
-                <button id="fullscreen" class="toolbarButton fullscreen" title="Fullscreen" tabindex="11" data-l10n-id="fullscreen">
-                  <span data-l10n-id="fullscreen_label">Fullscreen</span>
+                <button id="fullscreen" class="toolbarButton fullscreen" title="Switch to Presentation Mode" tabindex="11" data-l10n-id="presentation_mode">
+                  <span data-l10n-id="presentation_mode_label">Presentation Mode</span>
                 </button>
 
                 <button id="openFile" class="toolbarButton openFile" title="Open File" tabindex="12" data-l10n-id="open_file">