On Wed, Nov 05, 2025 at 10:48:06PM +0200, Eli Zaretskii wrote: > > From: Gavin Smith <[email protected]> > > Date: Wed, 5 Nov 2025 20:08:35 +0000 > > > > The results look ok with your test file, as you described below. I've > > attached a screen shot. One problem is the alignment of the math images, > > which appears to be inconsistent. > > I'm guessing this depends on the image. You could also experiment > with the various attributes of the image, described in "Image > Descriptors" node of the ELisp Reference manual. For example, > :ascent, :margin, and :height sound relevant.
The image is inserted into the buffer by Info mode. I have practically no knowledge of Emacs Lisp and would assume it is up to whoever works on Info mode to set the code to set these properties appropriately. I don't know how to inspect the attributes of the image anyway: I got as far as trying to run "M-x eval-expression RET (get-display-property) RET" before giving up. I expect it is unlikely that these images could always be perfectly aligned with surrounding text. I found on a page online that this information isn't part of the format: > Several other chunks were proposed but never approved as official > extensions, mainly due to the perceived lack of need for them. The > alignment chunk (aLIG, had it been approved) would have provided > centering and baseline information about an image so that it could be > aligned more cleanly with surrounding text; this would have been most > useful for images with transparent edges. The fingerprint chunk (fING) > would have provided a 16-byte MD5 fingerprint of the raw image data, > a type of cryptographic signature that could be used to test whether two > images were identical. Neither aLIG nor fING was ever put up for a vote, > and both proposals have long since expired. PNG: The Definitive Guide (Greg Roelofs) "Chapter 11. PNG Options and Extensions" https://www.libpng.org/pub/png/book/chapter11.html It's possible that AUCTeX and preview-latex have had or solved this problem before. > > In the highlighted part in orange, > > the top of the image is aligned with the top of the surrounding text, > > while this is not the case for some of the other images. Also it would > > look worse for people with much different screen resolutions from me as > > the images would either be too big or too small. > > Maybe try using the :scale attribute with the value 'auto'.
