Promote header has been improved to include a similar options as the Range Selector node. This makes selecting a header row in your data much faster with index selection.
Add Promote Header to any node in your Dataflow. Select any node and use the Transform (+) button to open the list of options to select Promote Header. You could work with the node in the Dataflow tab or use the Properties panel.
Set a header row by selecting a row index (i.e., row 12).
Select First Occurrence or Last Occurrence to create a filter condition to pick a header in the dropdown. The conditional lets you set the header row when the value in a selected field matches the given criteria in the filter.