>I noticed that the grid's Scrolled Event does not fire when I (horizontally) scroll through the fields using the cells area.
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>In my grid the total width of all columns is wider than the width of the grid, so there are always some columns invisible, either on the left or on the right or on both sides. When I use the horizontal scrollbar I can detect any change in the visible section using the Scrolled Event. If I horizontally scroll using the cells area this event is not triggered.
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>Who knows an efficient way to detect it?

Did you try using ARCC event?