If you apply a process filter when using your site, the system will remember the filter as you navigate your site until you log out.
If you would like the system to remember the filter even after you've logged out and logged back in, enable the Store Process Filter feature in your site. To do this, navigate to the Site Settings page and set the "Store Process Filter as a User Setting" feature to "True."
You can always clear the current process filter by clicking the red X icon.