+#ifdef SINGLE_THREADED
+ static bool single_threaded;
+#endif
+
+ static bool restrict_radius_ducks;
+ static bool resize_imported_images;
+
+ static synfig::String browser_command;
+ static synfig::String custom_filename_prefix;
+ static int preferred_x_size;
+ static int preferred_y_size;
+ static synfig::String predefined_size;
+ static synfig::String predefined_fps;
+ static float preferred_fps;