I don't change column widths for dataView object.
I removed Summary Column but still there is a first column with "100%" width. Sample source code is below about dataView.
<td style="width: 100%" class="lotusFirstCell">
<div></div>
</td>
So extraColumns have very small width because first column pushes them (extra columns) to right side of window.
Is there any solution about column width modification for dataView object ?