Yes. To customize the subject line, go to the Newsletters tab, then click on Upcoming Drafts. Select the draft whose email subject line you want to change. At the top of the newsletter, you will see the current subject line. Click Edit, modify the text, and click Save when you are done. You can also customize your From line and add a custom introduction. Personalizing each issue of the newsletter with an introduction or teaser "in your own words" can boost engagement and really give the newsletter a personal feel.