Constellation Combobox — does it support single-select mode?

[Sriraman (Sriraman Venkatesan)]

Hi all,

The Pega Design System page for Select / Combobox describes Combobox mainly as a multi-select + searchable component, while Select is positioned as the single-select option.

From my understanding, the Combobox can also be configured as single-select by setting Input settings → Mode → Single-select on the Data Reference property in App Studio. Could someone please confirm:

1. Is single-select mode officially supported for Combobox in the current Constellation release?
2. If yes, are there any UX or behavioural differences compared to using the plain Select component for a single-select use case?

Thanks in Advance

[RameshSangili]

I think you can use Auto Complete for Single Select. I don’t think Combo box can support Single Select. Please refer to cheat sheet to identify the controls based on Page/PageList

Constellation Cheat Sheet

The response to our previous article on Data Objects and field types has been overwhelmingly positive, with developers appreciating the practical guidance on when to use Data Reference, Embedded Data, and Query fields. However, conversations with the community reveal that many still struggle with a fundamental question: “Which data model option should I choose for my specific scenario?” This challenge isn’t about lacking technical knowledge—it’s about adapting to a completely different way of t…