Yes, you can! 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, swipe the filter to the left and ‘Delete’ will appear, click this and then ‘Delete’ when prompted again. You can also press & hold over the name and ‘Delete’ will appear, with a second prompt asking you to press ‘Delete’ again.