In Power Apps, both Combo box and Dropdown look similar but work differently. A Dropdown lets you pick only one item from the list — it’s simple and used for small data. A Combo box, on the other hand, supports search, multi-select, and even custom values. It’s ideal when you need to show large data or connect with Dataverse.
If you disable search and multi-select in a Combo box, it behaves just like a Dropdown.
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