Use the Region editor to remove applied styles or effects from a selected area of the worksheet.
Select the area you want to alter.
Choose Regions... from the Style menu.
Move in or out until you see the style or effect you want to change in the status line.
Click on Remove in the Region dialogue box.
The style or effect will be removed from your selected area.
If you have added many styles to a worksheet and are finding it over-complicated, you can use this option to remove styles which have become redundant from areas of the worksheet.