With VCL 13.1, you can set the new OptionsView.ColumnAutoWidth property to True in order to automatically widen groups to fit the editor width and arrange group items across a specified number of columns.
TdxGalleryControl - Add the capability to automatically widen groups to fit the editor width
Answers approved by DevExpress Support
We have implemented the functionality described in this ticket. It will be included in our next update(s).
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