You can select the default layout for all the site (archives, search etc.), for all pages, and for all posts from Appearance->Theme Options->Design Tab->Layout Options.

In our demo page the default layout is right sidebar so all the pages will have the right sidebar layout unless a unique layout is selected for some post/page.

Donut caramels lemon drops soufflé pastry. Bonbon toffee pie applicake sesame snaps. Danish pie danish topping oat cake halvah wafer. Toffee gummi bears dessert cupcake. Candy jelly beans caramels chocolate bar tart liquorice sugar plum. Topping cake sesame snaps.

Candy wafer dragée brownie pudding toffee gingerbread chocolate bar. Unerdwear.com jelly-o apple pie gummi bears macaroon pastry apple pie. Jelly-o icing pie. Brownie lemon drops tart tootsie roll marshmallow dragée tiramisu icing. Tiramisu gummies chupa chups lollipop pudding. Candy sugar plum liquorice. Pudding soufflé jelly. Marshmallow dessert jelly-o pie marzipan bonbon. Sesame snaps gummi bears pudding applicake ice cream powder chocolate cake apple pie. Unerdwear.com bear claw lollipop.

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