Hi All,
I need to have a drop down where the values are shown in group by category with a headings as below:
Any idea whether this is feasible in Appian or not?
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Not in the exact format you describe. But you could have two dropdowns, where in the first you select the category (the items that are in bold in your screen shot) and, depending on which category you pick you get the subset of items displayed for selection in the second drop-down.