Shrink images in posts proportionally?

can you provide a link to a page on you site that shows this?

here is an example

https://rarehistoricalphotos.com/b-32-bomber-factory-fort-worth-texas1944/

the image is hosted somewhere else

Adding the following css rule should enable you to fix this:

img {
   height: auto;
}

If you are using a child theme, add the height: auto; to the existing block of rules for the img element.

If you are not using a child theme (& don’t want to go to the trouble to creating one), you can use jetpack or another plugin that allows you to add custom css to add this.

Thnx you Mr. cubecolouar, problem solved.