For example, you can try to do like this:   1. Add empty column. 2. UniDBGrid -> ClientEvents -> ExtEvents -> function reconfigure: function reconfigure(sender, store, columns, oldStore, oldColumns, eOpts) {     // 2 - yourBtnColumn indx     columns[2].width = 68;     columns[2].renderer = function(val, meta, rec) {         // generate unique id for an element         var id = Ext.id();         Ext.defer(function() {             Ext.widget('button', {                 renderTo: id,