How to insert and right-align text that is not of the default font size?

This doesn't work:

(let* ((text "abcd")
       (len (length text)))
   (propertize " " 'display `((height 0.5) (space :align-to (- right (,len . width)))))
   (propertize "12345" 'font-lock-face 'error 'display '(height 0.5))
  • It doesn't line up on the right side. It's outside the visible space.
    – jo-so
    Jan 13, 2021 at 13:55
  • Have you tried to run the code in the scratch buffer? Is 12345 on the right side of the screen at you?
    – jo-so
    Jan 13, 2021 at 17:38
  • If you don't take all information I put into the question, how can you rate, if there's something missing? Might the part you are ignoring be the missing piece?
    – jo-so
    Jan 13, 2021 at 21:47

1 Answer 1


The example in the question works fine. There's a bug in Emacs 27.1 that makes it fail. See the discussion on the mailing list: Why is (1 . width) zero?.

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