I can actually help here, too. Add this as a snippet and play with the max-width
values. These seem to work for me. 1000px is the ‘break point’ for the display rule, so if it doesn’t jive, you can experiment with that part, too.
Note - copy this as-is. The indentations are important on a nested media query.
@media screen and (min-width: 1000px) {
.markdown-preview-view.is-readable-line-width .markdown-preview-sizer {
max-width: 900px;
}
.markdown-source-view.is-readable-line-width .CodeMirror {
max-width: 900px;
}
}
First one is for preview, second is for the editor.
I had similar problems when using a Surface. The resolution is really high for such a small screen.
Hope that helps!