This module adds a Views display that uses a SQL UNION to combine one or more results sets with the results of a master display. This is useful when you need to logically OR two or more sets of results that have different contextual filters or use different relationships.

As an example, let's define a view using contextual filters which shows nodes that either have a title matching a user-defined value or were authored by a particular user. Begin by creating a new view, at /admin/structure/views/add:

After you set up targets, you need to make sure that the displayed content in overviews is properly filtered by the current target. 

For example:

Mobile view is not being displayed?

If you tried to follow the USAGE section at project's page and something went wrong.

@see https://www.drupal.org/node/2689239#comment-12073131

Remember:

Clone the display of the view (page, block), not the whole View.

Change the machine name of the just cloned display - under the Advanced options (by default: [original name]_1)

This page is an example of how to use the Tooltip module in a Drupal Views.