This example describes how you add a ribbon page to a view. In this example we add the Import customers to the view Customer: View all. The ribbon page in views is only shown when a certain view is open. The main ribbon is always open and you can read more about that here:
Search for views and open the view Customer: View all
Click the arrow next to ribbon pages to expand view. Click add page and name it customers
Click the page header and click add page group. Name it Import.
Click the area above Import and click Add Command to select which commands you want to add.