UserCodes: Multiple Select instead of Dropdown?

Working with Application Studio…

We have a OrderHed_UD.Character01 field that stores a reason(s) when “Hold” is checked in order entry. In Classic, a user can select one or many reasons and the UD field stores them as: Reason1/Reason2/Reason3.

Capture - old hold reason

The following post got me close by showing me how to use the UserCodes.UserCodesCombo box, but that ends up just being a single selection.

Capture - hold reason

Anyone know what I should do to allow for multiple selection like we have in classic?

Thank you.

Populate Combo box with User Codes in Kinetic Form - Kinetic 202X - Epicor User Help Forum (epiusers.help)

Hello , i am trying to implement the multiple select dropdown box in the classic, i cant able to see this dropdownbox in Toolsbox. how should i implement this one, thanks.