Row fields can be set in the column settings for the main menu, to allow a user to see data for a field on a full line. This is very useful for data in text areas or track relationships, where the data is wider and viewing in a normal column layout is not ideal or impacts other columns.
You can also toggle the display of individual row fields (on by default) using the controls in the main menu options or using the quick menu for each record in the main menu (next to id icon). The base setting below will toggle the display of the complete hierarchy but you can also add toggles for sub levels by choosing the option from those rows. Once chosen, they will appear as options below also.