I want to add a right hand side bar on all my post pages. This sidebar needs to contain links to other articles in the category.
In order to do this, I have changed the settings in customise/ layout/ sidebar menu and I have added a new category post element which confuses me a bit because under display rules/ location I have selected the post category from the drop down menu but then another drop down menu appears containing a list of all of my categories to choose from.
I don’t understand. Why do I need to select individual categories?