From the MyBB forums:
Quote:What I'd do is something like this:
PHP Code:
.post_body img {
max-width: 80%;
}
That would make images have a maximum width of 80% of the post container.
Although I'm fairly sure this is CSS code. Perhaps it's added by some PHP? Anyway, the img max-width should do the trick. The issue is finding a reasonable max-width.
https://community.mybb.com/post-852871.html