diff --git a/cmGrPlot.c b/cmGrPlot.c
index 9f7d02d..158a01b 100644
--- a/cmGrPlot.c
+++ b/cmGrPlot.c
@@ -256,7 +256,7 @@ void _cmGrPlotObjSetFocus( cmGrPlotObj_t* op )
 
 void _cmGrPlotObjSetSelect( cmGrPlotObj_t* op, bool clearFl )
 {
-  // if the object is disabled or no selectable
+  // if the object is disabled or not selectable
   if( _cmGrPlotObjIsEnabled(op)==false || cmIsFlag(op->cfgFlags,kNoSelectGrPlFl | kNoDrawGrPlFl) )
     return;
 
diff --git a/cmGrPlot.h b/cmGrPlot.h
index 603d79a..0ed21aa 100644
--- a/cmGrPlot.h
+++ b/cmGrPlot.h
@@ -13,6 +13,7 @@ extern "C" {
     kRsrcFailGrPlRC
   };
 
+  // Graphic object type id's
   typedef enum
   {
     kInvalidPlId,
@@ -31,7 +32,7 @@ extern "C" {
     kPlusGrPlId,
   } cmGrPlObjTypeId_t;
 
-  // object cfg flags
+  // Object cfg. flags
   enum
   {
     kSymbolGrPlFl   = 0x0001,  // This object is a symbol
@@ -47,10 +48,10 @@ extern "C" {
   // object state flags
   enum
   {
-    kVisibleGrPlFl = 0x0001,
+    kVisibleGrPlFl = 0x0001,  //  
     kEnabledGrPlFl = 0x0002,  // Enabled obj's must be visible. 
-    kSelectGrPlFl  = 0x0004,  // 
-    kFocusGrPlFl   = 0x0008   // Focused obj's are also selected.
+    kSelectGrPlFl  = 0x0004,  // This object is selected - multiple objects may be selected
+    kFocusGrPlFl   = 0x0008   // Focused obj's are also selected - only one object can have the focus.
   };
 
   typedef enum