gitbook-html2print/assets/css/debug.scss

/**
 * DEBUG STYLES
 */

.debug .header { outline: 1px solid pink; }
.debug .body { outline: 1px solid purple; }
.debug .footer { outline: 1px solid pink; }

.debug .region-break {
    border-top: 1px dashed blue;
    box-sizing: border-box;
}

.debug img { outline: 1px solid blue; }