Select any word in this field with the mouse by usual click & drag (or, if single word selection, double click), then click on "hypertext" button below.
Follow any instructions for setting heirarchical search strategy if needed. When the field appears initially, you have the option of changing the path to this stack if different than I have supplied. The other lines I have supplied list the stacks (paths beginning with a colon) and their fields in the order of the search. Thus, you will search the fields of various stacks in a sequence you create for the text word you have chosen.
If the selected word is found at any level, you will be given the option of ending immediately, of exploring that level further, or of going on to the next level of your search hierarchy.