Hello, You can try to use this approach: 1. UniDBGrid.ClientEvents.UniEvents -> function beforeInit(sender, config) { config.checkColumnMoved = false; } 2. UniDBGrid.ClientEvents.ExtEvents -> function columnschanged(ct, eOpts) { var cols = ct.getGridColumns(); if (cols && cols.length>1 && ct.grid.checkColumnMoved == false) { if (ct.getGridColumns()[0].xtype == 'checkcolumn' && ct.getGridColumns()[1].xtype == 'rownumberer