Multiple options in ad type

[chagold]

how It is possible to make a choice of many options in 'Allowed types', for example both sale and rent?
Maybe it is possible to change the field type?
Or of prefixes will be with multiple options (as there is in the plugin of the cards of this site)?

 

[Naz]

You can add more ad types by going to Admin -> Classifieds -> Classified types

 

[chagold]

That's I know.
But I need an option that the client can choose 2 options
(When he wants to offer the property for both sale and rent).