Hi @addyjohnson,
Thanks for reaching out.
If you want to change the max-width of your individual post, you need to add some custom CSS that targeting only the post page, though I don’t want to recommend to change it with custom CSS because it might raise some responsive issue and we can’t help you to fix it due to custom CSS but I will still guide on how to change your max-width on the individual page.
If you want to change the max-width of your content container:
.single-post .x-container.offset {
max-width: 1200px;
}
then if you want to change the max-width of your content inside the container.
.single-post .x-main {
max-width: 1200px;
}
Just change the value with your desire max-width, please note that custom development is outside the scope of our support. Issues that might arise from the use of custom code and further enhancements should be directed to a third-party developer.
Hope that helps.
Thank you.