In the registry, the participant filters offer the "Save Filter" button which will allow you to save custom filter sets to your common registry searches. In the filter section you will see the turquoise "Save Filter" button, which will capture all of the filters you currently have applied.
When saving a filter, you will be prompted to fill in a custom filter name. This filter name is an open short text box that allows you to fully customize each filter name.
These filters will be saved under the filter section. In this example the saved filter is named for the age, study, and race by which the filter was sorted.