To cancel the column layout, do the following:
1.Select the text for which you want to cancel the column layout in the same way you selected it to create columns.
2.Run the One column command in one of the following ways:
•On the Home tab, in the Insert group, click the arrow to the right of the
Columns button and select the One column template.

•On the Page tab, click the arrow to the right of the
Columns button and select One column template command.

•On the Home tab, in the Insert group, click the arrow to the right of the
Columns button and select Column settings. In the Column settings window, select the One column template and click OK.
•On the Page tab, click the arrow to the right of the
Columns button and run the Column settings command. In the Column settings window, select the One column template and click OK.
