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-rw-r--r--documentation/src/subclassing.dox7
1 files changed, 4 insertions, 3 deletions
diff --git a/documentation/src/subclassing.dox b/documentation/src/subclassing.dox
index 82c94b049..e2357d692 100644
--- a/documentation/src/subclassing.dox
+++ b/documentation/src/subclassing.dox
@@ -226,9 +226,10 @@ use it for any purpose you want. Try to keep the value less than 100
to not interfere with reserved values.
\par
-FLTK does not use RTTI (Run Time Typing Information), to enhance
-portability. But this may change in the near future if RTTI becomes
-standard everywhere.
+To enhance portability, FLTK does not use RTTI (Run Time Typing Information),
+except on the Mac OS X platform. But this may change in the near future
+if RTTI becomes standard everywhere. RTTI use on the Mac allows to change
+the image of the cursor when dragging text data, as expected from Mac applications.
\par
If you don't have RTTI you can use the clumsy FLTK mechanism, by