This function is called Custom Queries. With Custom queries, you can store, re-use and even make issue list filter configurations available for your own use or the use of all your co-workers.
To save a query, select all the desired criteria as usual, so that the view fits your requirements. Then click on the Save button just above the list. You will be taken to a page called New query on which you can enter a name for this report. Furthermore, you can choose to make this report public, i.e. available for other users of your Planio. After clicking Save, you will return to the task list with the query you just created. The new query is now available via a link in the right sidebar under the title Custom Queries. You can also save a bookmark to this query for quick access.