Left Sidebar

To dis­play the Left Side­bar on the par­tic­u­lar page, just edit the page and choose the Left Side­bar from Select Lay­out Attribute Box on bot­tom right. For a par­tic­u­lar page, if you select the Lay­out in the page than it will over­ride the Lay­out set­ting set from the customize.

If you wish to change the Lay­out of all the pages than go to Appear­ance-> Cus­tomize-> Design Options and choose Default Lay­out For Pages only.