Hello Kasim,
The observed behavior is by design and you can remove the vertical Grid scrollbar with CSS if you like.
The vertical scrollbar is always visible because of the small empty space at the top right. It ensures that the header cells align with the data cells, as the two kinds of cells reside in separate HTML tables.
If the vertical scrollbar is only visible when needed, the empty space above it will have to disappear and appear at runtime, which will cause UI flicker. Moreover, it is not very straight-forward to detect when a scrollbar appears or disappears, so an always visible scrollbar improves the client-side performance too.
Regards,
Dimo
Progress Telerik
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