How to edit Default Side Bar?

How to edit default side bar?
I found no where to actually edit the content of the “Default Side Bar”

I have tried to edit the sidebar at widget, but nothing happens.
Then I created a new sidebar, and put in the components that I want.
Then I go to edit a post and assigned the new side bar, but yet when viewing the page as user, nothing happens. everything still looks the same as it is.

Ok, I have found the solution.
Many of the components in the post template is overriding the original settings of wordpress. So, edit the settings of wordpress won’t affect much on the components of the post layout. The post layout is called post template.

Here is the steps to edit the sidebar:
At the menu bar of wordpress, click on [cloud templates], then find [single post template] > then click on [edit with tagdiv composer]