adjusting text underlines in Pages
With underlined text in Pages, there’s apparent no provision for adjusting either the weight of the underline itself or its distance below the text.
The alternative would seem, then, to be the use of under-rules, which can be any size, any weight and placed anywhere and at any angle on the page, including under a word or words to simulate underlined text but styled to suit the author.
That leaves the question: Is there any way to ensure that rules so placed will remain in position under the given words if subsequent editing moves those words?