Hi,
The template is built with T3 framework which implements Bootstrap 3 so the layout will use 12 grids system. Assume that you’re using layout: content + right sidebar, you can open the respective layout file:
ROOT/templates/ja_megastore/tpls/blocks/mainbody/one-sidebar-right.php
With being said, you can increase the width of sidebar by changing the number of grid for ‘t3-sidebar’ div: http://prntscr.com/ecqrql but make sure that the total grid of content + sidebar is equal to 12.
For example, you change the class for sidebar from col-md-3 to col-md-4
In the div for the main content, you will have to change the class from col-md-9 to col-md-8
Hope this helps.
Regards
