Hello Jorge,
Thank you for the additional clarification.
Unfortunately, hiding the "more" button in the Options panel is not possible at this time. I have submitted a Feature Request for the development team to consider adding such functionality in a future release:
DataGrid: Visibility option for Filter's More Button
Please take a moment to up-vote and follow the item to show the development team your interest and support for the feature request.
Regards,
Lance | Tech Support Engineer, Sr.
Progress Telerik
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