I've been using the Evernote Mac app for 5 years and the lack of headers has been my biggest frustration. Finally Googled about how to do this in Evernote and found this thread. I just logged into the web and see you all have Large, Medium, and Small Header options. PLEASE PLEASE PLEASE add this feature to the mac app. Edit: So I finally have some clarity on the issue. I have the Mac app from the App Store. There was no way for me to "Check for Updates". I've downloaded the mac app directly from your website and see that this feature has been added. HOWEVER, please update the App Store's Evernote or REMOVE IT. There is no reason for anyone to get an old version of your software and experience similar frustrations.