from the user guide:
The Type Text action is similar to the Paste ac- tion, but will not put a copy on the clipboard. Also, more than just pasting the text, the applica- tion will treat the text as if the user had actually typed it, meaning it might perform commands based on the text. Use ⌥-return and ⌥-tab enter those special characters as text. E.g., the text Boston⇥MA⇥02134 (those are tab characters) with the Type Text action completes three differ- ent fields in a web form all at once. Using the Paste action would put the whole thing, including the tab characters, into the first field.
