Sliding Door Sidebar Compatibility
As of March 2017, the recommend method for sidebar compatibility is to use LifterLMS Labs: Super Sidebars, a free add-on that allows you to add sidebar compatibility to just about any theme in a matter of seconds without having to write any code. See the full tutorial here.
Use the snippet below to add sidebar support to the WordPress Sliding Door theme.
This theme has two sidebar so you’ll need to choose which sidebar you want on your courses or lessons.
If you want sidebars on the right, use it as is. If you want sidebars on the left, delete line 12 and remove the two slashes from the beginning of line 11.