Welcome to the #dominoforever Product Ideas Forum! The place where you can submit product ideas and enhancement request. We encourage you to participate by voting on, commenting on, and creating new ideas. All new ideas will be evaluated by HCL Product Management & Engineering teams, and the next steps will be communicated. While not all submitted ideas will be executed upon, community feedback will play a key role in influencing which ideas are and when they will be implemented.
But, if I am understanding you correctly, this cannot be done when choices are entered one per line? That was my point.
Using a view for choices has its own problems in that "refresh field on keyword change" doesn't work.
As mentioned in the previous comment, this can already be done. Closing as "already exists".
You can do this now, using a view and picklist.