List Page Filters

List pages have a filter below the header that lets you control what you view on the page. All filters that are created for a list page appear in the Filters drop-down list for selection. The current filter in use on the list page shows in the Filters field.

Note the following points about filters:

When you filter, the selection criteria remain in effect for the list page. If you leave the list page and return, the list is prefiltered with the selection criteria from the filter.
Any filter that you create is automatically saved.
You can edit and remove filters that you have created.
To override the filter criteria for the list page and show the entire list, click Clear Filter.
Filters are saved across sessions per browser. If you switch to a different browser, reselect a filter to apply it.

More information:

Edit List Page Fields

Manage a List Page Filter