I know it is possible to get a rule to act as a filler either side of, say, a chapter head text by using \definefiller with alternative=rule and, as explained in an earlier post https://tex.stackexchange.com/questions/497352/context-heading-text-surround..., define a left and right version. So, for example, for the left version: \definefiller   [ChapterLeftRule]   [ChapterRule]   [left=\zerowidthnobreakspace,    right=\quad] This gives me a rule that extends to the margins. What if I want the rule to be, say, 2 cm either side of my centered header text? I tried experimenting by replacing left=\zerowidthnobreakspace with left=\quads[3] and that did shorten the rule somewhat, but when I did the same for the other side, it did not balance correctly. So maybe I need to deal with the 'left=' differently to achieve the desired result... or try an entirely different method! Of course, I don't want the rule at the baseline, but raised, as the original stackexchange https://tex.stackexchange.com/questions/497352/context-heading-text-surround... example gives. Any clues? Julian