To save a filter (or combination of filters) you must be registered with Zapmap and signed into your account.
Apply the filters you would like, then press ‘Save’ in the top right of the screen. Give your filter a name and press ‘OK’. Your custom filter will now appear in your filters menu.
To delete a saved filter, press and hold over the name and ‘Delete filter’ will appear allowing you to press 'Delete' to remove the filter.