How do I edit a web pages Column Layout

 

    
1.  Click on Customise in the main menu.    2. Click on Site Content.
     
 
3. Under Home Page, Inner page and Information Pages, hover over the webpage you wish to edit.   4. Then click the Page Settings icon
     
 
5. You can changes the number of columns by click on the images on the left hand side   6. Save Changes