Q: What if drop-down combobox couldn’t be directly switched?
In this case, you need to drag an action into the Workflow Designer and manually enter the XPath of the value in the drop-down menu.
Assumed that we want to find a car on this website. Here we will extract the values from the "Any make" drop-down list under the "Find a car" tab.
If you don’t need to loop the values in the drop-down menu, you could drag a “Click Item” action into the Workflow Designer and then choose "Customize" to define ways to locate an item. Just paste the XPath (inspected in FireBug or Chrome extension) of the value in the "Matching XPath" textbox. And then click "OK" and "Save". Then you could get the value you want in the drop-down menu.
If you need to loop the values in the drop-down menu, you need to drag a “Loop Item” action into the Workflow Designer. See the step 2 in Scrape Web Data from A Drop-Down Menu 1.