Convert the Standard Blog page to a Right column?

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I'm trying to figure out how I can convert the basic Blog entry page to include a right side column, site wide content. I have a number of already built blog pages. Can I edit the standard template and have it effect all the already built pages? and If so, how would I best go about re-writing the page.
Thank you!

 
ideasponge replied on at Permalink Reply
ideasponge
The easiest way is to create a page attribute and then in your theme's view.php file add a check that will show or hide the right column.

Here is an example

if($c->getCollectionAttributeValue('show_right_column')==true){
   ///do something
}