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On the Blog Page tab of the Theme Options panel are located the basic settings of the Posts.
On the Blog Archive Page Layout area, you can choose the layout type of archive page: Grid or List view
What is an archive page?
Briefly said, the archive pages are the pages where the list of posts is displayed. The archive pages are generated to collect post pages under a certain post type, category, or tag. WordPress creates archive page content automatically and uses the default template to display the list of post types. It means that you can not edit archive pages as simple pages. You can only set the Layout view and the Sidebar position.
Select which sidebar to display on the blog archive page on the Archive Page Sidebar field:
Also, you can indicate the single post page sidebar under the Blog Post Sidebar area:
The sidebars can be created on the Sidebars section
Only the Primary sidebar from the sidebars list can be set under the Appearance > Widgets section
Select where to display the sidebar on the post page on the Left or Right side via the Sidebar Position section
For the Grid View of the Blog archive page, the posts Excerpt can be disabled/enabled on the Show Excerpt (for Grid View) field.
Show Excerpt On
Show Excerpt Off