I created a custom field of type Drop Down List (Multi-Value). I don't see a "Select All" option. Is there a way to configure the field to allow for a "Select All" option?
I never really considered this use case as the few multi-select fields that we use in my subscription have smallish numbers of values but the answer is no, there's no configurable property for this in the field definition. I can see the logic there so you might want to submit this via https://ideas.rallydev.com. I did a quick scan and don't see anything similar there right now. Hope that helps.