The size limit is 10MB. If your file is bigger than that, send the file to my email at: contact@dominique-davis.com
For romance authors, I recommend including: the meet cute/meet ugly, bonding chapters, the first kiss, chapters with tension, emotional scenes, jealousy, arguments, a grand gesture, flirting, spice (but it will be censored), etc. For other genres, chapters with high stakes, tension, action, suspense, a mystery, cliffhangers, subversive elements would work great.
e.g., A specific font, black background, only pink and yellow highlighter colors.