The archive page displays an archive of the blog posts by category, month and a list with the posts.
To create an archive page you have to create a new page (Page » Add New) and select the “Archive” option in the “Template” field of the page (located in the right sidebar of the edit page screen)
Setting the page layout
For this page you can select the layout to be Right Sidebar, Left Sidebar or Full Width. You can do this by setting the custom field Page Layout of the page:
Selecting a sidebar
By default this page template uses the Default Sidebar. If you would like to use another sidebar, you can create one in the Gossh Options » General » Sidebars section and after that you can set the custom field Sidebar and select the sidebar that you have just created. To customise it you have to go to the Appearance » Widgets and find the selected sidebar. You can drag and drop widgets from the left into it.
Applying a custom background color and background image to the page header
You can read about how to apply a custom background color and background image to the page header in the Changing the default background color and image section.