commit 53605ba05515d4981f9f6d77fcca317539a36867
Author:     ManoloFLTK <41016272+ManoloFLTK@users.noreply.github.com>
AuthorDate: Mon Feb 7 19:14:09 2022 +0100
Commit:     ManoloFLTK <41016272+ManoloFLTK@users.noreply.github.com>
CommitDate: Mon Feb 7 19:14:09 2022 +0100

    Add note about use of Fl_Window::decorated_h() under the X11 platform.

 FL/Fl_Window.H | 3 +++
 1 file changed, 3 insertions(+)

diff --git FL/Fl_Window.H FL/Fl_Window.H
index 4ce65f3..ddcea3f 100644
--- FL/Fl_Window.H
+++ FL/Fl_Window.H
@@ -519,6 +519,9 @@ public:
    added by the window manager.
 
    Same as h() if applied to a subwindow, or if window is not yet mapped.
+   \note Under X11, it's not possible to compute decorated_h() - h()
+   to obtain the height of the titlebar <b> during a resize operation</b>.
+   That computation is to best done when the window is first mapped.
    */
   int decorated_h() const;