If you are missing your footer on your Knowledge Base main page and article pages then check your theme configuration. You can also try to switch the KB Template option as described in this link.

The Tabs Layout does not show articles under the main top categories since the top categories are assigned as tabs for layout purposes. You need to assign articles to  sub-categories within each tab category. In your KB Overview page you will see a warning message explaining what you need to do.

If you want to have the KB Main Page on your Home Page, follow these steps:

1. Go to admin > Settings > Reading page.
2. Choose A Static page option
3. Choose the page where the knowledge base is located.
4. Save your settings.

The KB Main Page width depends on the number of category columns and the width of each column. This is handled automatically by the Knowledge Base. However you can control where the page will be show in boxed or full width view:

The Main Page width cannot be set to a specific size since it is based on columns width. We do not recommend to use custom CSS to change this.