Field attribute - slushbucket_ref_no_expand=true not working

[GB14]

We created a reference field on the "Application Portfolio Management" scope.

We added the attribute "slushbucket_ref_no_expand=true" but its not working,. 

The file stays like this 


but we want something like 



so we can select multiple choices 

any suggestions on how to solve this?

Thanks
G

[GB14 · Accepted solution]

I got it 🙂
changed the field type to list and all is good now.