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-rw-r--r--FL/Fl_Roller.H5
1 files changed, 5 insertions, 0 deletions
diff --git a/FL/Fl_Roller.H b/FL/Fl_Roller.H
index b96e92638..c9a77bea4 100644
--- a/FL/Fl_Roller.H
+++ b/FL/Fl_Roller.H
@@ -29,6 +29,11 @@
/**
The Fl_Roller widget is a "dolly" control commonly used to
move 3D objects.
+
+ The Roller can be controlled by clicking an ddragging the mouse, by the
+ corresponding arrow keys when the roller has the keyboard focus, or by the
+ mousewheels when the mouse pointer is positioned over the roller widget.
+
<P ALIGN=CENTER>\image html Fl_Roller.png
\image latex Fl_Roller.png "Fl_Roller" width=4cm
*/