Follow the steps below:

  • Right click on the element select list (A)
  • Extract the text of the select list (B)
  • Open the Advanced Settings (C)
  • Copy the entire selector of the select list (D)
  • Change the extraction from "Single-Value" to "List" (E and F)
  • Paste the selector of the select element into the "Base CSS Selector" textbox (G)
  • Append at the end of it the string "> option" (H)
  • Press OK to close the advanced settings (I)

The preview on the right side should now be displaying all the options of the select list.