Creating popup with multi select

[DikWil]

I want to create popup with multiselect in Calls module where users assigns to calls. I need to some (not one) users will be assigned to call at the same time. Can you help me?

[SamuelAugy]

Hello,

You can assign some users or contacts to a same call by search the users in subpanel. So you have a button "add" for each user found to assign them to the call.