MacOS app: shrink size of images

I recently started using the MacOS app after many (happy) years just using the website. It’s great but was wondering if there is a way to shrink the size of story images?

The web app seems to make images smaller (often too small) but I guess the MacOS app is rendering them at full size which is often too big.

Claude wants me to use custom CSS, presumably based on a 2021 discussion about the web app, but I am not sure if it knows what it’s talking about.

Just to be clear, I am talking about the story column. (I think that’s what it’s called). I found the settings to adjust the size of images in the preview column. Thank you!

I’d love a couple of screenshots, one of the web and one of the macOS app, showing the same story.

Here is the webapp and the MacOs app. This is an ebay listing run through rssbay. I am including a direct link to the item

https://www.ebay.com/itm/358538514824