Read Line Length (wider-note) - CSS snippet

Description: allow individual note bypassing of limiting line length set in Settings-->Editor-->Readable Line Length

Filename: wider-note.css
Save to .obsidian\snippets
Add property: cssclasses: wider-note

  /* save this as wider-note.css in your snippet */
.wider-note {

    /*Set the width of your desire here*/
    /* --user-custom-width: 60rem !important; */
    --user-custom-width: 1500px !important;

    /*Code for edit view*/
    --file-line-width: var(--user-custom-width) ;

    /*Code for live read view*/
    /* --content-max-width: 100rem !important; */
    --content-max-width: 1500px !important;
    --content-base-width: var(--user-custom-width);
}

Reference: