This may have been 10 months ago, but I was having the same problem and thanks SkylerV I am now sorted.

And with pretty much every other theme you don't need a plugin either. Page attributes, as SkylerV describes them often have slightly different wording, but usually the same essential function. It's easier than you think.

hey Gary with RCG Forest you only have to go to your pages and click edit, once you done that on the right side below the update button should be a block titled "Page Attributes" There should be 3 things in this box 1- Parent 2- Template and 3- order. Click on Template and scroll to you see "Full width page- Template- no side bar" once you've done that just click update and view your page. It should be without the side bar. Let me know if this helps? :-)

I maybe able to help what theme are you using?

Depending on your theme you can change your page layout for individual pages - go to the page you wish to modify and look under Page Attributes - then under Template - in that drop down menu you will have options on the page lay out. Sound like Full Page is what you are after - this will eliminate your sidebar(s) -

Hope that helps
Leo

If i have got you correctly, You mean to say - you do not want the same sidebar on all the pages. If that is the case, you need to install a plugin called widget context. than you can control your sidebar more easily.. If that is the case reply me,, i will send you video of how to install it and customize your sidebar.