Updated about to talk about new part labeling method.

tools/imglab/src/main.cpp

@@ -21,7 +21,7 @@
 #include <dlib/dir_nav.h>
 
 
-const char* VERSION = "1.13";
+const char* VERSION = "1.14";
 
 
 

tools/imglab/src/metadata_editor.cpp

@@ -644,7 +644,11 @@ display_about(
     sout << wrap_string("It is also possible to label object parts by selecting a rectangle and "
                         "then right clicking.  A popup menu will appear and you can select a part label. "
                         "Note that you must define the allowable part labels by giving --parts on the "
-                        "command line.  An example would be '--parts \"leye reye nose mouth\"'."
+                        "command line.  An example would be '--parts \"leye reye nose mouth\"'. "
+                        "Alternatively, if you don't give --parts you can simply select a rectangle and shift+left "
+                        "click to add parts. Parts added this way will be labeled with integer labels starting from 0. "
+                        "You can only use this simpler part adding mode if all the parts in a rectangle are already "
+                        "labeled with integer labels or the rectangle has no parts at all."
                         ,0,0) << endl << endl;
 
     sout << wrap_string("Press the down or s key to select the next image in the list and the up or w "