diff --git a/leocad.qrc b/leocad.qrc
index 62eb6143..7047dd07 100644
--- a/leocad.qrc
+++ b/leocad.qrc
@@ -50,8 +50,6 @@
         <file>resources/time_first.png</file>
         <file>resources/time_last.png</file>
         <file>resources/time_next.png</file>
-        <file>resources/time_pause.png</file>
-        <file>resources/time_play.png</file>
         <file>resources/time_previous.png</file>
         <file>resources/time_stop.png</file>
         <file>resources/icon64.png</file>
@@ -65,5 +63,7 @@
         <file>resources/edit_transform_absolute_translation.png</file>
         <file>resources/edit_transform_relative_rotation.png</file>
         <file>resources/edit_transform_relative_translation.png</file>
+        <file>resources/piece_show_earlier.png</file>
+        <file>resources/piece_show_later.png</file>
     </qresource>
 </RCC>
diff --git a/qt/lc_qmainwindow.cpp b/qt/lc_qmainwindow.cpp
index 7b6483da..318eb831 100644
--- a/qt/lc_qmainwindow.cpp
+++ b/qt/lc_qmainwindow.cpp
@@ -132,6 +132,8 @@ void lcQMainWindow::createActions()
 	actions[LC_EDIT_ACTION_ROTATE_VIEW]->setIcon(QIcon(":/resources/action_rotate_view.png"));
 	actions[LC_EDIT_ACTION_ROLL]->setIcon(QIcon(":/resources/action_roll.png"));
 	actions[LC_EDIT_ACTION_ZOOM_REGION]->setIcon(QIcon(":/resources/action_zoom_region.png"));
+	actions[LC_PIECE_SHOW_EARLIER]->setIcon(QIcon(":/resources/piece_show_earlier.png"));
+	actions[LC_PIECE_SHOW_LATER]->setIcon(QIcon(":/resources/piece_show_later.png"));
 	actions[LC_VIEW_SPLIT_HORIZONTAL]->setIcon(QIcon(":/resources/view_split_horizontal.png"));
 	actions[LC_VIEW_SPLIT_VERTICAL]->setIcon(QIcon(":/resources/view_split_vertical.png"));
 	actions[LC_VIEW_ZOOM_IN]->setIcon(QIcon(":/resources/view_zoomin.png"));
@@ -323,8 +325,6 @@ void lcQMainWindow::createMenus()
 	menuStep->addAction(actions[LC_VIEW_TIME_PREVIOUS]);
 	menuStep->addAction(actions[LC_VIEW_TIME_NEXT]);
 	menuStep->addAction(actions[LC_VIEW_TIME_LAST]);
-	//LC_VIEW_TIME_STOP
-	//LC_VIEW_TIME_PLAY
 	menuStep->addSeparator();
 	menuStep->addAction(actions[LC_VIEW_TIME_INSERT]);
 	menuStep->addAction(actions[LC_VIEW_TIME_DELETE]);
@@ -435,9 +435,8 @@ void lcQMainWindow::createToolBars()
 	timeToolBar->addAction(actions[LC_VIEW_TIME_PREVIOUS]);
 	timeToolBar->addAction(actions[LC_VIEW_TIME_NEXT]);
 	timeToolBar->addAction(actions[LC_VIEW_TIME_LAST]);
-	//LC_VIEW_TIME_STOP
-	//LC_VIEW_TIME_PLAY
-	//LC_VIEW_TIME_ANIMATION
+	timeToolBar->addAction(actions[LC_PIECE_SHOW_EARLIER]);
+	timeToolBar->addAction(actions[LC_PIECE_SHOW_LATER]);
 	//LC_VIEW_TIME_ADD_KEYS
 	// TODO: add missing menu items
 
diff --git a/resources/piece_show_earlier.png b/resources/piece_show_earlier.png
new file mode 100644
index 00000000..b0aded37
Binary files /dev/null and b/resources/piece_show_earlier.png differ
diff --git a/resources/piece_show_later.png b/resources/piece_show_later.png
new file mode 100644
index 00000000..0cb2c818
Binary files /dev/null and b/resources/piece_show_later.png differ
diff --git a/resources/time_pause.png b/resources/time_pause.png
deleted file mode 100644
index 01a66020..00000000
Binary files a/resources/time_pause.png and /dev/null differ
diff --git a/resources/time_play.png b/resources/time_play.png
deleted file mode 100644
index d7dbd450..00000000
Binary files a/resources/time_play.png and /dev/null differ