List in Requests Catalogue

In Process Studio, in workflow parameters I have a parameter of type list. After publishing the workflow, when I submit request from the catalogue, I see a list where I can select only a single value. Is there any provision to select multiple values in a list?

Yes, Process Studio workflow parameters configuration has an option UI Control next to Type. Corresponding to a Type there are options available in the UI Control list which determines the appearance on the catalogue request submission.
Corresponding to type List, the following UI Controls are available,

  • Combo Box
  • Radio Button
  • Single Selection List
  • Multiple Selection List
    Please select a desirable UI Control to view on AE UI. This should fulfil your requirement.