Switch to side-by-side view
--- a/src/qtgui/preview_w.cpp +++ b/src/qtgui/preview_w.cpp @@ -936,7 +936,8 @@ if (!fn.empty()) { editor->m_image = QImage(fn.c_str()); - editor->displayImage(); + if (!editor->m_image.isNull()) + editor->displayImage(); } }