By default editable grid cells are not notable, users do not know, which cell they can edit. It makes sense to mark them with dotted borders. For this purposes I have overrided the’Ext.grid.column.Columns‘ class and added ‘x-grid-cell-editable’ css class to the cell’s TD tag. As you can see from the fiddle sample the ‘Email’ and ‘HomePage’ fields are editable unlike the ‘Name’ and ‘Phone’ columns.