For filters you find yourself using often, Esper supports a "Save Search" function.
- To save a Collection filter, navigate to the selected Collections by pressing the
icon. - Select the desired Collection or combination of Collections
- Press the
button - Type in the name for the filter
- Tap the
button
. 
There is an option to set the collection filters as the default search filter. If you would like the filter to be the default anytime you search, check the Set as default search filters box, then press Save Search. Your search results going forward will default to the selected Collections of this saved filter.
Access Saved Filters by pressing the 
icon.
- Press your desired Search Filter
- Press Apply
- Your search results will update to include results from the Collections in the Saved filter
. 
- To delete a Saved Filter, click the trash icon to the right of the Saved Filter
