MSG_ZOOM_OUT
case MSG_ZOOM_OUT:
fToolBar->AddAction(MSG_ZOOM_OUT, this, tool_bar_icon(kIconZoomOut),
_AddItemMenu(menu, B_TRANSLATE("Zoom out"), MSG_ZOOM_OUT, '-', 0, this);
fZoomOut = new BButton(bounds, "ZoomOut", "Zoom out", new BMessage(MSG_ZOOM_OUT));
case MSG_ZOOM_OUT:
fZoomOut = new BButton(BRect(left, top, left+10, top+10), "ZoomOut", "Zoom Out", new BMessage(MSG_ZOOM_OUT));
case MSG_ZOOM_OUT: fPreview->ZoomOut();